Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf421bc0ca5c7dcb…

MALICIOUS

PDF

45.4 KB Created: 2020-08-11 07:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b0f439031e3faa6900d73d704bec2ed9 SHA-1: c053142c9868f5318de29ac80806d8ff4ca293a0 SHA-256: cf421bc0ca5c7dcbe444ab3275b3efa27c6971cc3aef03075bef8f866b8206f5
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to ttraff.ru, which is flagged as malicious. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be tricking the user into clicking the malicious link.

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=city+of+god+saint+augustine+pdf In PDF document text
    • http://files.katiehornphotography.com.au/uploads/1/3/2/6/132683140/364771.pdfIn PDF document text
    • http://files.ryandavidbirdlarson.org/uploads/1/3/0/7/130739233/nilobirilaja.pdfIn PDF document text
    • http://rotusamiz.flushingfutbolacademy.com/uploads/1/3/1/4/131483108/risezez.pdfIn PDF document text
    • http://files.waggabeekeepers.com/uploads/1/3/0/7/130740444/nobozeranetolixaji.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/1/0434/5430/0327/files/dojot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/94055054881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/kinetic_fluid_trainer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/bifofizurik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/glencoe_algebra_1_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/honda_company_balance_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8176/8864/files/vitamin_b12_structure_and_function.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/i_751_checklist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/vegese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5122/0120/files/tavakixuxawuxebosabuzame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/xaxafivopep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/gexelosafogisozutezupof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/67815267469.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_off00006664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 5088 bytes
SHA-256: 22f77501b7e0bb1236cf0d44538059a3ddf7d0279af73bed5dd9d7fac9847503
font_01_sfnt_off000077dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77DD 15196 bytes
SHA-256: 64ef91c15f72629fb6f4ae37ec5009f8ac1546b43a50973ef32726a27677939b

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