Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b868d34c2cd5d90…

MALICIOUS

PDF

56.3 KB Created: 2020-08-10 13:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8aa90273c96d91f349d81cc7e4b75df SHA-1: 4fecc1860914eec6fef7dd6e3bc4867fcc118f4a SHA-256: 9b868d34c2cd5d9086d705027f284dcfbf4d67c7e49b63eef88df4b6f5049502
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO poisoning. A critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the primary attack vector appears to be luring users to malicious websites via embedded 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.cc/pify?keyword=quantitative+data+analysis+with+spss+pdf In PDF document text
    • http://files.dietislab.org/uploads/1/3/1/8/131856129/4178566.pdfIn PDF document text
    • http://files.thefirmuk.com/uploads/1/3/1/8/131871571/vulipilofin_tabuxomoviwakek_fozotenepazime_nunova.pdfIn PDF document text
    • http://files.tcpmagic.com/uploads/1/3/1/3/131379991/b5b09b4.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/1/0428/9835/8432/files/tiwimuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8765/1235/files/wixulepefifepezaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/73547262163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/nanisanirimagiduvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15074065918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gojifazuxosupimuron.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9903/7595/files/fusabekuluboziz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/38733577445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7644/3543/files/sangrado_por_varices_esofagicas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4588/6884/files/einstein_field_equations_derivation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/nasurefunojuvugu.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_off00009c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C99 5348 bytes
SHA-256: ec47088ae4fe2918ec27968a7a33662bebdb49ff2be9f2828d44f924491f2f8b
font_01_sfnt_off0000aee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE4 10912 bytes
SHA-256: 0be279329d9c237f7a0cd125ca44ecbbbdef748946b68464ed171b0e3dae446a

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