Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a205fcb70bf01e4…

MALICIOUS

PDF

62.8 KB Created: 2021-01-04 19:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e85f8e9387e3aa6e4a4efc4e7783ca81 SHA-1: d3238e5e3dd8620430cc504794f531dc3f98fdb8 SHA-256: 3a205fcb70bf01e45a5683f4569bce9977d88821d4a3f015eb22dc686e787980
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URL 'https://traffmen.ru/123?utm_term=aveeno+cc+cream+medium+tinted+moisturizer' is a known malicious redirector. The document's structure and numerous links suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=aveeno+cc+cream+medium+tinted+moisturizer
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/pafepekotokok-newuwu-giwuravimizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zetubakuz/cone_air_filter_vs_flat.pdf
    • https://uploads.strikinglycdn.com/files/61679706-a8de-4df6-a812-9ed1baa6da87/70711755957.pdf
    • https://uploads.strikinglycdn.com/files/889c8685-88d6-4984-80b8-81d4715eb1af/gexot.pdf
    • https://s3.amazonaws.com/sewamos/interview_questions_on_c_pointers.pdf
    • https://uploads.strikinglycdn.com/files/403889c2-f3c5-4745-bec8-45b828a50586/crash_bandicoot_ps1.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/68705442458.pdf
    • https://uploads.strikinglycdn.com/files/9fd7e2a9-c1b8-4196-9405-16327595f6c0/understanding_exposure_free.pdf
    • https://uploads.strikinglycdn.com/files/ca22f7ce-9b2a-4428-aa04-e265acbe10da/pagefeziriba.pdf
    • https://uploads.strikinglycdn.com/files/ab2b389b-baba-4589-a23f-269683c56cfa/31862788802.pdf
    • https://s3.amazonaws.com/febopa/abbot_s_lea_school_uniform.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b87d.bin
e197d92a64e2dada79cee9e1630d5bdf89c18ca84d05168955dda9615bb4b406
pdf-font-stream PDF embedded font (sfnt) at offset 0xB87D 5152 bytes
font_01_sfnt_off0000c9f6.bin
1864ee5d04fcf4555ef58a746996b9e15e263015c647ccbf8d9a46ce7f29d425
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9F6 10780 bytes