Malicious PDF — malware analysis report

Static analysis result for SHA-256 f640851ab49af773…

MALICIOUS

PDF

59.5 KB Created: 2020-08-05 04:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f8e067f513ed023e0b4401d256a1005 SHA-1: 3a9ab460b725184a6ed829018ff1c43f807e556f SHA-256: f640851ab49af7734c663c003c5abdd3fa304f1b56b45ef0f21624ca0ad9f0fc
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded URLs. One of these URLs points to a known malicious redirector, and the document itself appears to be a link farm designed to distribute traffic. The primary intent seems to be directing users to malicious or phishing content through a network of links.

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.ru/pify?keyword=branko+milanovic+desigualdad+mundial+pdf In PDF document text
    • http://files.invictund.com/uploads/1/3/0/9/130969508/dasijezex_gonakoxe_mebuwatefexane.pdfIn PDF document text
    • http://files.cindysasso.com/uploads/1/3/2/7/132740482/9062b171307989f.pdfIn PDF document text
    • http://files.historywithmrsb.com/uploads/1/3/2/6/132695258/0af54d9e4f192e9.pdfIn PDF document text
    • http://files.britanniabeachcommunity.org/uploads/1/3/2/6/132695278/ebcfa245937ae4.pdfIn PDF document text
    • http://files.matthew-j.com/uploads/1/3/1/4/131437443/bopamowelo-vubavum-zoberes-gaxej.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/1/0430/2585/8714/files/bifewosowugopobip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4687/1974/files/79105601529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/safakot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/79142516730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/mafovunukilini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/energy_drinks_health_risks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/angry_emoji_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7723/8945/files/java_iso_8601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/19382844652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/zaserona.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4017/files/9804634466.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_off0000a7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CC 5648 bytes
SHA-256: 689670bb3efb5e0e1996d85af2b1dd22ffefe0ae45f204f069c9e23432f2d327
font_01_sfnt_off0000baf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF9 10500 bytes
SHA-256: 6a615b74ae508e374f8a8789d10506b28e23d1dbd5ec7d2e4432e02c2f0832aa

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