Malicious PDF — malware analysis report

Static analysis result for SHA-256 def3bb37df9176ec…

MALICIOUS

PDF

44.4 KB Created: 2020-08-28 14:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 672e485e21a654beb40d59638128446b SHA-1: bb09cedfcba58af9e094950238142c91e60b24de SHA-256: def3bb37df9176ecc1195744629f59083204ba0c6748707bd2b21610b607706b
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, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=central+oregon+rockhounding+map+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm designed to lure users to potentially harmful content.

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=central+oregon+rockhounding+map+pdf In PDF document text
    • http://files.signalmountaintravel.com/uploads/1/3/1/3/131382032/vonerijawi_mefaf.pdfIn PDF document text
    • http://bilariwi.buttecollegebcea.org/uploads/1/3/2/6/132683165/kajuguwi.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/1/0431/9015/7473/files/depebavunovegufuwikijakux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3354/9205/files/lelexufovaliwevit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/chicken_chop_suey_nutritional_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/96950784392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/wubamedudaziwinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/fokiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/rumavexux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/79946976699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/90354525299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/70106209340.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/gubobesuvixilufoxunibodoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/fitgirlsguide_free_download.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_off00006f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5360 bytes
SHA-256: c3d1566d8f7798cb1b471c3f17083956a51c7daab9df7e77c9e3cd8de163fb8b
font_01_sfnt_off00008170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 10588 bytes
SHA-256: d2434d2f18d46cc1d8f3d97a755c1458e9d657e1afbf3e1e6cafd1209576a381

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