Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a01ebb22d6b0915…

MALICIOUS

PDF

49.3 KB Created: 2020-10-16 12:21:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8f6702ce84bbad0cf2e695ab9f78eae SHA-1: 53cf78ee4ecb58126d2e9a5cbbfef8f27d4c99ba SHA-256: 5a01ebb22d6b091570c93458acf9d7d00dc1d20d912fdd79926a1ccf143d8050
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious infrastructure, disguised as a manual download. This is further supported by the PDF_SEO_LINK_FARM heuristic, indicating a large number of external links, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be social engineering via a deceptive link.

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.link/pify?keyword=orbitrek+platinum+cross+trainer+manual
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/nalamexu.pdf
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f8756d651aeb.pdf
    • https://cdn-cms.f-static.net/uploads/4366627/normal_5f890573d32e3.pdf
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f870a2e8ccbf.pdf
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f870873eac4e.pdf
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f876147a59fb.pdf
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f87e12224c02.pdf
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5f87d2fd1b247.pdf
    • https://cdn-cms.f-static.net/uploads/4366304/normal_5f88b199d0e1e.pdf
    • https://uploads.strikinglycdn.com/files/8b01a9c1-e625-46ba-a30f-75a16756cbb7/10525678009.pdf
    • https://uploads.strikinglycdn.com/files/df797357-605d-48b2-9d56-1393f8a5132e/58739910849.pdf
    • https://uploads.strikinglycdn.com/files/139f6595-24c4-41b8-b0ce-046b523f636f/wobevokiwiranonovenu.pdf
    • https://uploads.strikinglycdn.com/files/f2ca80f9-7fad-4dd1-be12-66252fac1e68/vufodapusebonivowibog.pdf
    • https://uploads.strikinglycdn.com/files/8d0c3265-551a-4124-b82d-21cdcea54630/jipezu.pdf
    • https://uploads.strikinglycdn.com/files/b36bb7e5-61f9-4bc2-b7ff-0dcd02e98198/vosufigazixonibaxejinudar.pdf
    • https://uploads.strikinglycdn.com/files/9a2bcb23-19ac-4c3c-aa5c-0faad2159ade/94809611266.pdf
    • https://uploads.strikinglycdn.com/files/ee3f8877-4ddc-432c-b825-4ada4598ba35/nomokopudafixevuj.pdf
    • https://uploads.strikinglycdn.com/files/5ed21656-b08f-42ea-8d20-e5c3f4943ca9/wosasunazorokupok.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b9b.bin
bd02c4d440da32d738f476d214626009d53af2005550e2ba27285485f4028697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9B 5308 bytes
font_01_sfnt_off00008d85.bin
37521d61de078aef5e4a8530900d08743321f3daefb7ffc3c630abf9c5362de2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D85 13020 bytes

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