Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7f296344c9d5b8…

MALICIOUS

PDF

88.7 KB Created: 2020-11-30 17:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b952e6775d37e1999ca387676e6a0285 SHA-1: 10d6a1021d489ef9e54048675299e43a82e09e16 SHA-256: bf7f296344c9d5b8b7e4266531ef6270efd5399baf2adaf0ab1be5f09e49c0b4
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'cctraff.ru', and also exhibits characteristics of a PDF SEO link farm with numerous external links. The ML classifier and ClamAV also flagged this file as malicious, specifically as a phishing trojan. The presence of these indicators suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

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
  • 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.
  • 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://cctraff.ru/aws?utm_term=1080p+video++sarkar In PDF document text
    • https://miniroworopan.weebly.com/uploads/1/3/4/4/134444940/mekoruzesuluk.pdfIn PDF document text
    • https://rigopodi.weebly.com/uploads/1/3/4/3/134307943/bufijagapug_vevaxot_koromuva.pdfIn PDF document text
    • https://fobolobal.weebly.com/uploads/1/3/4/3/134317950/9b8c9e3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485454/normal_5fa7ed772e382.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/9895647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f96202b0e3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8899e5247af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07ad173fb5383b68f3cb/1606289326049/the_west_ken_burns_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfaf82c6de34c7a38c638/1606220537239/9667984274.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe01a49ee0f32b871a21da/1606287780519/88689231985.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe24593c02f22b9dd69c23/1606296666726/29404642502.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd158af6f5f91feb7033cc/1606227339928/pawuborevowopaja.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_off00010638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10638 5904 bytes
SHA-256: a94ad066563bc1a290202e8937bf3222ef9dcc01e8c15382a867c4ef2fde5f15
font_01_sfnt_off00011a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5E 5336 bytes
SHA-256: 17f87271abcd503e17c21e98e1f7530a580db7e85e514f55aa24b68b3b9fc10a
font_02_sfnt_off00012ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA2 12824 bytes
SHA-256: a7e9865de5dbd2478a5a73c17c9eeab93c40cee1db1240584429b324674a8bfb

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