Malicious PDF — malware analysis report

Static analysis result for SHA-256 77fe18be0755e917…

MALICIOUS

PDF

54.2 KB Created: 2020-08-10 17:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0bbc31c46277783e681228eac2df62fb SHA-1: 1f4088e50b1a7828cea45d58183c75ca1cf4df4d SHA-256: 77fe18be0755e917c4dbba0ac462ab2b3631024d05f790bc9439b4d9aefaeb7b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service identified as malicious. The document body and heuristics indicate a link farm strategy, likely intended to phish for credentials or distribute further malware. The ML classifier strongly supports the malicious nature of this PDF.

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://ttraff.cc/pify?keyword=ciclo+biologico+de+ancylostoma+duodenale+pdf In PDF document text
    • http://poxew.thebiocompatibledifference.com/uploads/1/3/0/8/130873826/9556734.pdfIn PDF document text
    • http://files.dsempoweredlife.com/uploads/1/3/1/6/131636990/6838276.pdfIn PDF document text
    • http://divenil.accrochooked.com/uploads/1/3/2/8/132814930/6319244.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2613/6731/files/65477574489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/ritowuxivavijulodapabokuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9139/2664/files/92829165263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/gukoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/tejepiline.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3415/6967/files/zipoteramemukakevilip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2066/5510/files/22648627162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/makalah_invertebrata_dan_vertebrata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4514/3206/files/define_advertising.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/kalesegevovirozim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/kilirusutuviji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7917/8142/files/texas_instruments_nspire_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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC8 5528 bytes
SHA-256: 20526619d7e193a3c89551e6c7c7f87c81663ba8f4b51d6b49af966af9db11e7
font_01_sfnt_off00009d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D77 14700 bytes
SHA-256: 367ce95cb3a5ec2bee846f2680348cd9314482b89ed9479d1e5d438800108c9b

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