Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfefcc6ac48bb350…

MALICIOUS

PDF

72.1 KB Created: 2020-11-23 18:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 470c0333ca3cff760e93968a2cc0e2e6 SHA-1: 125173ceab8f33cdbe84c1ddd5cd224cd039e2d9 SHA-256: bfefcc6ac48bb35097e6830a12b776beed7973e207a26f2abc5cecfa9f47a23b
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with a critical heuristic firing for malicious redirector infrastructure. The primary malicious URL identified is 'https://ggtraff.ru/123?utm_term=pokemon+team+plasma+goal'. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to redirect users to potentially malicious content, aligning with phishing or SEO manipulation tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/123?utm_term=pokemon+team+plasma+goal
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fa10c193792a.pdf
    • https://lufiwusogak.weebly.com/uploads/1/3/4/3/134319395/245f08.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/213d4b6108d59.pdf
    • https://solunezowalini.weebly.com/uploads/1/3/4/6/134625762/22cbef9.pdf
    • https://kisigitoteke.weebly.com/uploads/1/3/3/9/133997396/1161501.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pibajuwi/6306888624.pdf
    • https://s3.amazonaws.com/xamapebonijos/18533915076.pdf
    • https://s3.amazonaws.com/lonozote/visio_customer_journey_map_template.pdf
    • https://s3.amazonaws.com/tuxenipup/zewimejejidosawu.pdf
    • https://s3.amazonaws.com/zuguvoxoki/58974453126.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_off0000d392.bin
43ac3705f8806778f80ae3199cc7df949236d0122275bfac6cdc6920ec328911
pdf-font-stream PDF embedded font (sfnt) at offset 0xD392 3164 bytes
font_01_sfnt_off0000deeb.bin
ab4e6ddae7eb2ec2df93640d66f2816a538034615719688e9e1bcbc03a376943
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 5108 bytes
font_02_sfnt_off0000f045.bin
910f60c050cc4bc551a6ad1277e819d6ac5b6036fc34b6b84f8aecd4a0b06e6a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 10124 bytes