Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ca7479debc224c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-03 23:42:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8282fabd3a87b4c8be29acaf3202f657 SHA-1: 9c635fe79b8d8647d4aa6002ccaeaf694998a503 SHA-256: 12ca7479debc224c867c41ce6e54e7773807fabcc622deba527a931293bd9b9f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector, which is part of a link farm designed to host numerous PDF files. The document body itself contains the primary lure URL, suggesting an attempt to drive traffic to potentially malicious or spam content. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.cc/pify?keyword=history+of+ancient+egypt+pdf+free+download
    • http://files.councillpsychiatric.com/uploads/1/3/0/7/130775561/jisawodanoseve.pdf
    • http://files.itsnotstreaming.com/uploads/1/3/0/7/130738673/26071.pdf
    • http://files.sarahrosepeterson.net/uploads/1/3/2/6/132695493/1386074.pdf
    • http://files.hotsill.com/uploads/1/3/0/7/130775859/1f104.pdf
    • http://files.memphisjrscience.org/uploads/1/3/0/8/130813965/femaxepokox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2611/9847/files/ty_beanie_babies_prices_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/wokanozewotosesinamijigu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3253/files/30927954062.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31968244380.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/navy_seal_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/tosuto.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/79014554242.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6218/files/goromajij.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/vowugasikuferorajaziraw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/todesidaruxugofubi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/38455467616.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_off00006320.bin
a10306ece93c733c3ef9aa87ad45e882dc662071786f829d343bf52ac4453909
pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 5476 bytes
font_01_sfnt_off000075ea.bin
969071603a1c15899d8125bc9658e26c3e18c430a5ef14833353e43fd607fe72
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EA 10364 bytes