Malicious PDF — malware analysis report

Static analysis result for SHA-256 072fe1435c667402…

MALICIOUS

PDF

36.9 KB Created: 2020-10-31 20:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d0ebcc150b8d41f49556eaba5a885e8 SHA-1: 7ae7edbaebf9414828f16a505e92549a78632941 SHA-256: 072fe1435c667402f92a204ef060cb993ec146ce3dfc383e869fd1405056ad2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to redirector infrastructure or are part of a link farm. The primary malicious URL identified is https://gettraff.ru/strik?keyword=floating+ice+chest+academy, which is flagged as a known malicious redirector. This suggests the document is designed to lure users to potentially harmful websites, likely as part of a phishing or scam campaign.

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://gettraff.ru/strik?keyword=floating+ice+chest+academy
    • https://cdn-cms.f-static.net/uploads/4379476/normal_5f8b6d4ea7d83.pdf
    • https://panirosarukiza.weebly.com/uploads/1/3/4/1/134132539/fomufabifugiratop.pdf
    • https://cdn-cms.f-static.net/uploads/4427793/normal_5f9a1463b7e2f.pdf
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5f89dd6d666e7.pdf
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f8bbf2636511.pdf
    • https://cdn-cms.f-static.net/uploads/4382638/normal_5f9256d775a0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/04861283-a37b-4762-943a-8fad02e671c5/nizedilifilinikabelo.pdf
    • https://uploads.strikinglycdn.com/files/34730996-4569-4a5b-8cd1-227726ce9eb1/2010_secondary_solutions_the_outsiders_literature_guide.pdf
    • https://s3.amazonaws.com/kakef/wuniranevalet.pdf
    • https://s3.amazonaws.com/rujimidujek/kumapigenufozasa.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_off00005129.bin
31aae1fe4972bbac51c6937dd768af1266d12979ac2bad3e8ee39fa13a566583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5129 5312 bytes
font_01_sfnt_off0000631e.bin
cb7bb48b02cb5fef8a8938c7a5a37dfcec937a0f59df8c372e720f8bde626110		 pdf-font-stream PDF embedded font (sfnt) at offset 0x631E 10612 bytes

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