Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3a7510f74e5e4f…

MALICIOUS

PDF

56.3 KB Created: 2020-10-29 08:34:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 623d2af5e88db50e4d101b0f83cf7816 SHA-1: 94cda48fd8cd590f736f37c3caed734cc2dff7a1 SHA-256: ae3a7510f74e5e4f258d7524336f2ac00bedecde7511517e7e7d3771c5e6a0c3
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Cabell county courthouse personal property taxes' and a URL that appears to be part of a link farm designed to drive traffic. The presence of numerous external PDF links and a malicious redirector suggests an attempt to lead the user to a malicious site, likely for a scam or phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=cabell+county+courthouse+personal+property+taxes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f8d52c49c923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8754196127d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5f918fd32aa13.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/wenowamopa_berowagelo_lawiwitovevisom.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/9371372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f9a3c0aee4c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f8ca0d31cb4a.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/3448931.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7814/6462/files/xafotetama.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/food_for_today_textbook_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c115ff-60aa-4d87-a125-b393e8491415/hacked_version_of_pokemon_go_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8e268b-34ce-4df7-9ff6-b5346e2ffefa/silujutofeginoronefariva.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/75154434904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4913/8846/files/39852455355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9789/3280/files/gta_vice_city_android_mod_cleo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3499a693-7c75-46fe-8619-315c2d9c20c5/20842181527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47556dc1-934c-471e-91d7-076858a906fe/raveloduror.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/3929117591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4e8faa2-5c46-4e82-9f9f-1d65783ad01e/simple_planes_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0f9f08-d0fd-4828-a302-ca0bd89dd1af/86522923283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51375589-dcfb-4675-978a-efca7aa6ece9/valudeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/vocab_level_g_unit_12_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfc760d-976b-44b8-9234-81324bb88743/71987049542.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/85855131844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf5f4d4-73ed-42e4-801f-410512688093/xisesojuxupeguzuveres.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B9 5188 bytes
SHA-256: 30f28287ebb72cfcefdb71d951e0e27cfbbb8cc3e42f3e9d6417f65164438c05
font_01_sfnt_off00009b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B5B 12788 bytes
SHA-256: 1dea9a527b8aed31bf61d973ad112768b3f5879ebc228c38b241a524b42c0aa8
font_02_sfnt_off0000c4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B8 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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