Malicious PDF — malware analysis report

Static analysis result for SHA-256 176ed78ac2fb84d9…

MALICIOUS

PDF

44.6 KB Created: 2020-10-10 02:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ffc956ef47b6af6627890561152f441f SHA-1: 2eb8c303b59785ae55a09a7300c18bc10771dafd SHA-256: 176ed78ac2fb84d9f124ff666f1ed530f54f21b4ea50f4bd6be09a79cd022657
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/strik?keyword=torn+page+of+the+final+truth In PDF document text
    • https://site-1039576.mozfiles.com/files/1039576/81040663232.pdfIn PDF document text
    • https://site-1039295.mozfiles.com/files/1039295/65589636405.pdfIn PDF document text
    • https://site-1048568.mozfiles.com/files/1048568/44004077083.pdfIn PDF document text
    • https://site-1038780.mozfiles.com/files/1038780/13552765950.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/gibavukiv.pdfIn PDF document text
    • http://files.acornequalityfund.org/uploads/1/3/2/7/132741089/4e651fa5b2e1.pdfIn PDF document text
    • http://files.colourismyworld.com/uploads/1/3/0/8/130873946/25c3c0816eb1a8a.pdfIn PDF document text
    • http://files.versgras.nl/uploads/1/3/1/3/131398171/dijudivekefekir.pdfIn PDF document text
    • http://files.michaelpapenburg.com/uploads/1/3/0/7/130738943/4aaaedf8de.pdfIn PDF document text
    • http://files.absolutepoolstx.com/uploads/1/3/1/6/131637325/3533975.pdfIn PDF document text
    • http://files.tuitionchemistry.com/uploads/1/3/1/6/131606492/7969912.pdfIn PDF document text
    • http://wuzid.kellytobias.com/uploads/1/3/1/3/131398097/2757063.pdfIn PDF document text
    • http://tufoxolo.alltechalliance.com/uploads/1/3/1/4/131453325/5780550.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/1/0476/0023/8748/files/sea_turtle_ppt_slideshare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7227/5103/files/old_cycle_country_manual_lift_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/pulavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4222/1479/files/wojobis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8649/6415/files/kenwood_ts-450s_service_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_off00006373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6373 4816 bytes
SHA-256: 6487fbf2e4cdcd886f2302ea2b2581663ee3d87829600e67ed6e1a4e88ddeb72
font_01_sfnt_off000073c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C8 10396 bytes
SHA-256: 90b59d01c80c10a0aafea1da40c72fbf01f83cb52527f1c52669a8a939fefdac
font_02_sfnt_off0000973a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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