Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b4d682ee9433f6…

MALICIOUS

PDF

53.6 KB Created: 2020-08-01 15:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f613bc2c135c01d9a3bc0fadafce90f SHA-1: 84146346520953d26262434266879129d04b4097 SHA-256: 90b4d682ee9433f6b6ac801de189ab7d79deda00f5f1490f154c3b5e86544a3f
202 Risk Score

Malware Insights

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

The PDF contains a clear lure for free downloadable content, specifically "for dummies collection pdf free download". It embeds numerous links, with one identified as a malicious redirector pointing to ttraff.cc. The presence of a "download button" heuristic further supports the deceptive nature of the document. The primary intent appears to be directing users to malicious infrastructure through these links.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=for+dummies+collection+pdf+free+download In PDF document text
    • http://files.aishasuniquecosmetics.com/uploads/1/3/1/8/131871494/wifevuv.pdfIn PDF document text
    • http://files.informatieoorlog.com/uploads/1/3/1/4/131437862/4409094.pdfIn PDF document text
    • http://files.anotherwayschool.org/uploads/1/3/1/3/131380308/nopebebulife.pdfIn PDF document text
    • http://files.alaskansforwildlife.com/uploads/1/3/1/4/131483955/a97782680c3.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/1/0434/3123/1649/files/sosogiladadojew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/83865976980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1533/8144/files/21151969005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4630/4920/files/99037361813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/duporojojarin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/xezekuwilojolamaxapedarol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1014/6983/files/piripufajawodojeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/88469224744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/wexirewemofidulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5167/7856/files/nasibatiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6573/5328/files/rekefozedamo.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_off000087f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 5348 bytes
SHA-256: 261403984004724b4495697cb752ebb71c4b3dc0a3f49dda304de313a40bcc28
font_01_sfnt_off00009a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A27 15148 bytes
SHA-256: d78fbbdb814dc93f39b29bbe4aad8b4c4a859e1fe2d0e3b83600cb8d9754127b

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