Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c875d38e5befb6…

MALICIOUS

PDF

49.0 KB Created: 2020-08-22 21:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17089bd79403ea74fcccd47e226d91de SHA-1: b79172cf07ff061b5146a82968c7ffe3121d5bb4 SHA-256: 71c875d38e5befb6ff7c43a0644de6f7dfd0b27a8cdeabc8dc01b53cbf93d9c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, masquerading as a "thyroid cancer guidelines pdf", that point to a malicious redirector. The redirector is likely used to funnel victims to a phishing or malware distribution site. The presence of multiple SEO-optimized PDF links suggests an attempt to broaden the attack surface.

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=thyroid+cancer+guidelines+pdf In PDF document text
    • http://bakilulu.christmasinchilhowie.com/uploads/1/3/1/8/131856185/33710da41.pdfIn PDF document text
    • http://varakire.emanueldeutschmann.net/uploads/1/3/0/7/130775085/bb6f11db6a.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/1/0433/8922/3066/files/12292203117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3590/files/15499112707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8001/5271/files/ljubljana_restaurants_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/gyrocopter_dota_2_guide_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/42102393092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4583/8232/files/rawiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6833/2959/files/67063142100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1562/files/99628021631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/cinematic_video_editor_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3881/8982/files/zadepokojibugokijefobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/60125007439.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 2

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_off0000821d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821D 5468 bytes
SHA-256: 728d8ad7c29f38ab0801228628ebac185f7668fcb34dad322d611624612ae28f
font_01_sfnt_off000094b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B8 10208 bytes
SHA-256: 34e8ea38843de00a00113ca0d2e6979eb0dba58382eaaecb34d3c3c17f6797d6

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