Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdcabb37d8581335…

MALICIOUS

PDF

49.2 KB Created: 2020-10-16 23:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cdc765769c8e189867709339ecf9d9ab SHA-1: e3f4fd1ace169d3818b0103d8495cb137aa4fdc8 SHA-256: fdcabb37d8581335a6ff83d90428dc1a5e6234eb2b10707fcf55d27ca27670b0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.me/123?keyword=linking+words+liste+englisch+deutsch+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f87f65051476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f89c7921e5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f886d6fcce25.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/mosikeriz-bidepeb-tizon-nenefaxupi.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/borit.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/ralas-tapupav.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://uploads.strikinglycdn.com/files/db086392-fd25-4cb9-87fb-278e3af4eedb/bavitubinapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9e03d7-e9a4-42a5-967d-a8293c12849a/kamojuxibatewolijumokapul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d3770c-23f9-4b7f-a7e6-947bfd20fa9f/sekizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772960ac-089b-4fb4-90f3-d2ddef2f9209/68689074124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6587/1013/files/84429260260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4833/6536/files/30674127776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/warsaw_guided_reading_lesson_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6249/1286/files/uworld_step_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1067/0759/files/dlna_app_android_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b9e945-e242-45eb-8853-b92a59b1e871/white_rodgers_thermostat_model_1f86-344_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4599da4d-0f6d-46d3-a4b6-c87c9ef807bc/67055792423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d03317e-a7e7-4fb9-859f-63b3a121a432/52202181638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37fd1dda-e33e-425a-9dcc-9aa97f4468c2/52792061331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0046/1474/files/exploration_lite_full_version_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8786/2429/files/warren_w_wiersbe_commentary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6148/9049/files/black_and_decker_appliances_replacement_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9332/6501/files/51289028062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5841/3216/files/justin_charger_manual.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_off00007198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 5188 bytes
SHA-256: 0c1805e73d6ab2c05bbc9a244e3a27a883425ed2bdd6756803c9ca3f8ba41229
font_01_sfnt_off0000834c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834C 10996 bytes
SHA-256: 25b4e61167619e40c340c3b97209a30b923edef3af0e660361a2a841ef8456eb
font_02_sfnt_off0000a750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA750 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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