Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0b50073a87dee3…

MALICIOUS

PDF

46.5 KB Created: 2020-08-01 23:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d754c4556c1e6600e0ff95e81fd48f6a SHA-1: 97d3dba1369c777b52df17bd136a8a7a3abeb2d1 SHA-256: cd0b50073a87dee38fb679024f9081bc3bf2fac69e5245ba81644c05dc3440de
194 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=atf+form+3310.+4'. The document body also contains this URL along with a large number of other links to PDF files hosted on various domains, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=atf+form+3310.+4 In PDF document text
    • http://files.strivetriclub.com/uploads/1/3/1/1/131163736/wakini.pdfIn PDF document text
    • http://files.urrbraewetlandlc.org/uploads/1/3/2/7/132710565/mabepaxi-susesadefep-zovozadoli.pdfIn PDF document text
    • http://files.westlinnalcohol.com/uploads/1/3/1/6/131606331/nimofizopora-fepixi.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/1/0437/2486/5685/files/85956121101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2019/7781/files/fikutokumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8488/2844/files/tubojokotifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5654/5433/files/54479392316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8679/1334/files/86929044764.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0591/0933/files/69823726097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1520/0158/files/5925797116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/48813168267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/gungeon_amulet_of_the_pit_lord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/90146754624.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/92244762454.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 6

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_off000076af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AF 4960 bytes
SHA-256: 5fc4b12b3c7cfb538cd9a9a6ca00ee812f88f0419c6497c29000683e814838c0
font_01_sfnt_off00008798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8798 11120 bytes
SHA-256: 0c8560915804bcb2e4d0842eb0b9e43844e10b1ab354a2d32496c68fb051b2b0

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