Malicious PDF — malware analysis report

Static analysis result for SHA-256 5680dac78efe8097…

MALICIOUS

PDF

69.0 KB Created: 2020-11-13 14:30:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18a553b3160d7019a8e0f2f2e5272900 SHA-1: d37bd1cb946979fc659a938b50c2aa7445212952 SHA-256: 5680dac78efe809756a9a87210b2aad1f05b749249446b7f3d772a01904b4dfc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious domain ('trafffi.ru') that is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?utm_term=gaggia+xd+evolution+user+manual
    • https://cdn-cms.f-static.net/uploads/4448984/normal_5f9ff11307c0d.pdf
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5f8a1e2a877df.pdf
    • https://lefiletigej.weebly.com/uploads/1/3/4/5/134597596/2c9756da6a.pdf
    • https://cdn-cms.f-static.net/uploads/4402247/normal_5f925f2781ecb.pdf
    • https://teguvubab.weebly.com/uploads/1/3/4/3/134347924/e6714ec6a9d163.pdf
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/kopamez.pdf
    • https://cdn-cms.f-static.net/uploads/4366625/normal_5f970406c61d0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/93edb566-ef6c-48b9-a885-13f388526bd8/xezumonebutab.pdf
    • https://s3.amazonaws.com/pukasojalu/wedding_invitation_card_website_template.pdf
    • https://uploads.strikinglycdn.com/files/7dd8c6dd-5b3d-43b0-a585-22549ec4f0d6/girls_christmas_dresses_size_12.pdf
    • https://uploads.strikinglycdn.com/files/9053f2e1-28cf-47ca-a336-0ed3fbc46ddd/wawasewo.pdf
    • https://uploads.strikinglycdn.com/files/dd460d13-1269-413d-bc34-2a5997d8b669/tejekegadimevotalenevewun.pdf
    • https://s3.amazonaws.com/senodiw/awaken_the_giant_within_free_download.pdf
    • https://s3.amazonaws.com/jupevuxirapi/sd_governor_noem_press_conference_today.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1ec.bin
ddb7c27e4f3e641b4b2b11d40009670acfd27f2154594cd1d177a420f9cec396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1EC 5188 bytes
font_01_sfnt_off0000d386.bin
e0c13add03e1e5012e59b9268235f61b67eb1068b8a8264033e4185477ef72d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD386 11408 bytes
font_02_sfnt_off0000f948.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 4324 bytes

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