Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f91404ee5dcf430…

MALICIOUS

PDF

44.8 KB Created: 2020-08-23 02:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 86b2aa04386abcbf1563d3194ff071a0 SHA-1: e6af681f241de38558cca7e380300549da042775 SHA-256: 8f91404ee5dcf43028b7e687591eb1341b79a89ca3c7fed08fb750578cecad29
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru', which is likely used to obscure the final malicious destination. The document body text, though partially corrupted, contains keywords related to 'Cnet android phone reviews', suggesting a lure to attract users interested in technology reviews. The primary attack pattern involves directing users to malicious or deceptive websites.

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=cnet+android+phone+reviews In PDF document text
    • http://dunufuvi.snowmack.com/uploads/1/3/0/8/130813592/sividadexotilodaxe.pdfIn PDF document text
    • http://files.crumistuff.com/uploads/1/3/1/0/131071277/wuwikudofipisetuxode.pdfIn PDF document text
    • http://files.taramillsauthor.com/uploads/1/3/1/3/131383771/2096190.pdfIn PDF document text
    • http://lasososos.kirkistownprimaryschool.com/uploads/1/3/2/8/132814930/4705090.pdfIn PDF document text
    • http://zepuwe.sub240.com/uploads/1/3/2/7/132710603/xawaboza-fubulasal-bajafasodiduba.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/1/0437/2368/6056/files/wijumuxerikokitiluwadurok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3168/3484/files/bavuzukagojesomumirixami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/crystal_reports_2013_evaluation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/97008189518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/gonosokukewapujug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/jilamugal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/bitax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5208/files/53690715917.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5944/4896/files/multiplication_worksheets_grade_5_math_drills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/boxing_training_mp4_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/1275695613.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 5

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_off000071f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F9 5072 bytes
SHA-256: 1795ac3af2dfabc585a8df10feed31546d0641230a1073a4819824db0c7fc696
font_01_sfnt_off00008342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8342 10284 bytes
SHA-256: 137e7605caa364d081caa668c76c04f9a47751253cddca922127b319b1bea0ec

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