Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db40753c5469271…

MALICIOUS

PDF

47.9 KB Created: 2020-10-15 17:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ac112f0045c3c36b7f8fa12a9d9497d SHA-1: ad7b0d9907d73d548d0c7fab90d4e74476b6d9ca SHA-256: 6db40753c5469271faf5e895801cd18dc175cc6640d7dc695d75bc7c657fe484
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to host other PDFs. One prominent link, 'https://ttraff.me/pify?keyword=bbg+beginner+workout+pdf', is identified as a malicious redirector. This suggests the document is part of a campaign to drive traffic to malicious sites, likely for phishing or malware distribution, masquerading as a workout PDF.

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.me/pify?keyword=bbg+beginner+workout+pdf
    • https://site-1036803.mozfiles.com/files/1036803/97987078143.pdf
    • https://site-1044010.mozfiles.com/files/1044010/61202088289.pdf
    • https://site-1043885.mozfiles.com/files/1043885/32991516264.pdf
    • https://site-1043090.mozfiles.com/files/1043090/13730127755.pdf
    • https://site-1038927.mozfiles.com/files/1038927/67133408666.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f875d68df4d6.pdf
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f87adc838831.pdf
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f8843edb6e6a.pdf
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f87c3c24668c.pdf
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f871bb4eb12f.pdf
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f87b32272ba5.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f870dbca26b8.pdf
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5f8736643f635.pdf
    • https://site-1039923.mozfiles.com/files/1039923/litunumagamedamowo.pdf
    • https://site-1038527.mozfiles.com/files/1038527/68841178010.pdf
    • https://site-1042498.mozfiles.com/files/1042498/gerafot.pdf
    • https://site-1044243.mozfiles.com/files/1044243/pabekitafewakovunuwenud.pdf
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sixatuzatena.pdf
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/demevawovobel-ruxez-kawoja-kelam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a8eba743-7e1e-48a7-b1f3-3de0f186e091/dekidimagizujewojoxedel.pdf
    • https://uploads.strikinglycdn.com/files/83d90a55-9951-4bba-a114-bb2375787eac/99832949579.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_off00007189.bin
6b1886100909a5777bb30fc7b7be00bba8ed48ad5f5b392b7a0cb4783a0739ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 3016 bytes
font_01_sfnt_off00007c43.bin
ccd52e66eb0bc94ac83e09d485f925f27ef43197f736f14c5cee6e493783d788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C43 5136 bytes
font_02_sfnt_off00008de3.bin
8cbfc2c2ca0d7bcedd489a7ecaff7d2b4d6712f88e7d1e4c3525b7b7403f6826		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 10536 bytes

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