Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fcef0584da946fd…

MALICIOUS

PDF

39.7 KB Created: 2020-08-16 20:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 123531648ac4bf18b9460598ca72f76b SHA-1: c2cb70f79580b08982437e2b72c8143ac319b846 SHA-256: 8fcef0584da946fdb4dcd924609ab3b86572c8f338fcb8a2bff1b492da09f66e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.ru). The document body also contains the same URL, suggesting a lure to a phishing or malware distribution site. The presence of a large link farm further supports this malicious intent. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer the attack pattern.

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=tagged+facebook+photos+2017 In PDF document text
    • http://jowoxi.michaelgreermd.com/uploads/1/3/1/4/131483254/xenowadov.pdfIn PDF document text
    • http://kekegokar.queersfordinner.com/uploads/1/3/2/3/132302780/1945846.pdfIn PDF document text
    • http://kufij.shop2a.org/uploads/1/3/1/4/131454165/8909165.pdfIn PDF document text
    • http://nevakofog.easystreetdiscount.com/uploads/1/3/2/8/132814930/zidesot-dofarixo-fipilorub-masisatop.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/1/0433/0687/7080/files/vuxevitilikibuvenimomabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4306/0901/files/56483716659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/63200646261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/dunutogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3785/9735/files/mathematical_modelling_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8661/1357/files/guitar_jazz_arpeggios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/32915492660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/89950573283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/93715748065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7335/3381/files/mupinebigezivabibimas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7073/2950/files/jamape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1928/6174/files/fonomikujibara.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 4

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_off00005c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C92 5848 bytes
SHA-256: f645c94d7bd553fd104b835e1c688e799c11f7cddb2f959e0e59b6df7d2bd00c
font_01_sfnt_off00007082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7082 9828 bytes
SHA-256: 7bbb259ba74131fd312bf972798b2f5c7c37a2b97345ef73c57789482e54a911

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