Malicious PDF — malware analysis report

Static analysis result for SHA-256 21cdfdd5530422ae…

MALICIOUS

PDF

44.1 KB Created: 2020-08-01 16:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 872ba3d09be72ab64f1a460dfa52c285 SHA-1: 9ebdf86b79665ef7f085c194b8b558c528c6dedf SHA-256: 21cdfdd5530422ae00e1db20d1ed96cf5bb4fd210ae21f95471cb559e21e2393
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=attitude+seed+bank', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify URLs, suggesting a lure to external content. The presence of a callback lure heuristic further supports a phishing or scam-related intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=attitude+seed+bank In PDF document text
    • http://files.udiginc.com/uploads/1/3/1/0/131070342/58208.pdfIn PDF document text
    • http://files.sidemocrats.com/uploads/1/3/1/4/131408117/rifefeposokaj.pdfIn PDF document text
    • http://files.kununurraneighbourhoodhouse.org/uploads/1/3/2/7/132740193/wajegomadazapam_digomapudidag.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/1/0431/4005/5208/files/93329422220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7179/8424/files/gimomivuzadijukepamek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/44635155457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5864/0534/files/70958926313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1993/4628/files/60878307409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/nadaradupuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/xitonarumajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/birabilorabudifozaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/gejibejijejixosivetiwum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/bebiwipudikiluguja.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 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 4656 bytes
SHA-256: 682b7fae2bcf4b0ddcfc95a6b59763385f257949c70ccb417f7125ecf4636de9
font_01_sfnt_off00007284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 10448 bytes
SHA-256: 30ed40965cfb5bb71b184055cb3233fcab904374456a9bb8ffe73fff17238f4b
font_02_sfnt_off00009634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9634 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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