Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d56a3bb34947749…

MALICIOUS

PDF

45.3 KB Created: 2020-07-28 22:10:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a74fa1d3394e394bd17d26db501ecb7d SHA-1: c92177b317d12401ff43cdf0cf4eaadae6b34489 SHA-256: 8d56a3bb34947749eeb94d19060afd0d57d09e2bbc995a7eb190b9652e1f70a9
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Player unknown battlegrounds steam free', suggesting a lure to attract users to click on the malicious link. The presence of a link farm heuristic further indicates an attempt to distribute content or redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=player+unknown+battlegrounds+steam++free
    • http://files.darkpoetry9.com/uploads/1/3/1/6/131606000/mimimujirus.pdf
    • http://files.janekoopman.com/uploads/1/3/0/7/130775429/siluf.pdf
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/66827971438.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vujunuvitiwowus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/fodizigibad.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/18049542294.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/tomunojo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/zoluru.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/40208425623.pdf
    • https://cdn.shopify.com/s/files/1/0429/7628/0729/files/talozomo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2109/1484/files/67526175453.pdf
    • https://cdn.shopify.com/s/files/1/0433/8106/3838/files/29237267242.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_off00006f62.bin
7ae267b2d3afdee5cc4f69277f7d5e4e5662b87d2963c7d847f4953aab22ce5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F62 5460 bytes
font_01_sfnt_off000081f3.bin
6ef3b9e65f7efd237915582542690cc9e405baa9f0fde500c0824b254e993fd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F3 11284 bytes

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