Malicious PDF — malware analysis report

Static analysis result for SHA-256 717559a6f71b2863…

MALICIOUS

PDF

72.9 KB Created: 2021-01-20 07:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a75d6937df03135f3b88d9cf70cab741 SHA-1: 837caf1047917b684cda61bd080cd96554845ed1 SHA-256: 717559a6f71b2863ac1af3639d6160d6c784d264deccdf2a59d12f2033d19338
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru', and another high-severity heuristic indicating a browser extension installation lure. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document is designed to trick users into downloading potentially harmful software or visiting malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffking.ru/123?utm_term=ad+block+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fec48ae4e327.pdfIn PDF document text
    • http://xipevufizokev.iblogger.org/71194633082.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/VjbTnib/pamerokijaninamu.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/jb2jaTH/facebook_lite_download_app_store.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5f8ecccee85c3.pdfIn PDF document text
    • https://cdn.sqhk.co/biluvetizom/co8IOH9/pitodadupinawosegitogo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423714/normal_5fe25ff611519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5f9491928eddb.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/ggihjif/paxunokeweninule.pdfIn PDF document text
    • https://cdn.sqhk.co/megilujij/hhbiiEJ/94211519812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_5fb7922756b15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418365/normal_5f994e41994a9.pdfIn PDF document text
    • https://cdn.sqhk.co/vagekoxes/gehfgfp/basic_spanish_words_to_learn_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417815/normal_5fd1443c1ed9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f98a20e7b194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/merozek.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/53404884909.pdfIn PDF document text
    • http://jigabez.epizy.com/xitezosa.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/cfit_skala_3.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/homologous_and_analogous_structures_answer_key.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60B 4984 bytes
SHA-256: 66f3b905dc7e868755ff473ae83463a99a900683f2d6e38d1ed4296fd006bafd
font_01_sfnt_off0000e70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE70C 2868 bytes
SHA-256: 4cce57f1badfe2d544d5af5e11a9264872ca64845a96acb2ad15a4392955a51d
font_02_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 10264 bytes
SHA-256: 3478f2b2a9f27a31179817ef4fcfe01edcb0f6a3f4dff354b5839d8020baa736

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