Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f6dcbcc0404176…

MALICIOUS

PDF

71.0 KB Created: 2020-12-08 04:30:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 195fd0c7e874c7b6fe42ff987cd43f55 SHA-1: 822a7b0e5ddccdd7b74ad21c5306c2a9e3f40b4b SHA-256: a9f6dcbcc0404176d5f8cafb586f691c82d00df7861a403236f2b688741b3def
156 Risk Score

Malware Insights

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

The sample is identified as malicious by multiple heuristics, including ClamAV and an ML classifier, and contains a significant number of external links. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, with one prominent example being a Weebly hosted PDF. The embedded URL points to a suspicious domain, trafftec.ru, which is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=it+cosmetics+bye+bye+redness+sensitive+skin+moisturizer+review PDF link annotation
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/ad690a296eace7c.pdfIn PDF document text
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/vefenejalanu_towozuserum_sewedu.pdfIn PDF document text
    • https://bodukomemewasug.weebly.com/uploads/1/3/4/7/134701633/lurigu.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/fadedosi/fudasowe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38e39104edf1d7791b9fc/t/5fc478dc3f75b1664363ae32/1606711517356/toshiba_fire_tv_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/60068904598.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/the_photograph_movie_2020_plot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5908716f6d44b07de34e8/t/5fcdd3eb7ae85b53b2b36b40/1607324651635/38107762110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e954c09a-a198-422a-bac6-28981db7c22a/zuweni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4295309-5622-4f71-8fef-26a3c94cb3d1/kelly_clarkson_wrapped_in_red.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/68907877152.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/91507699571.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/18201883710.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D3 5288 bytes
SHA-256: 08c51b0c332d3d2fe9894bdd9a5690e5c14443e3e5fb4457c2904c68ff4a63ea
font_01_sfnt_off0000e8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DC 11304 bytes
SHA-256: 5ee10509125f0cd9ca47cf05f5f1085ce3a8f7c1f3fd800a226f4548d4d79959

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