Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c967f172bd7bdf…

MALICIOUS

PDF

42.2 KB Created: 2020-08-23 04:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a570d87411bf04f78166fb6d8d52566e SHA-1: 18c619616d00703330b3a6c2678b8845513cec8a SHA-256: c2c967f172bd7bdf94e7b25be23f78d56e5604fd93f79425b5eada3d8b92cdd9
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=frosty+the+snowman+sheet+music+for+beginners`. This indicates the document's primary purpose is to trick users into visiting a malicious URL. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility for the malicious link. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer the attack pattern.

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.com/pify?keyword=frosty+the+snowman+sheet+music+for+beginners
    • http://files.mywright2bdazzled.com/uploads/1/3/1/4/131406827/mirenizitolulafagelo.pdf
    • http://files.fausthomes.com/uploads/1/3/2/7/132740413/6499086b058f96c.pdf
    • http://tififex.simonspence.net/uploads/1/3/0/7/130739624/fuwufep.pdf
    • https://cdn.shopify.com/s/files/1/0429/4275/9071/files/35212294460.pdf
    • https://cdn.shopify.com/s/files/1/0465/3540/9814/files/medianav_evolution_9._1._3_android_auto.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/lopamidogo.pdf
    • https://cdn.shopify.com/s/files/1/0465/5788/8662/files/driving_home_for_christmas_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/assam_cabinet_minister_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/71667230489.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/36791766221.pdf
    • https://cdn.shopify.com/s/files/1/0436/4078/3008/files/xuluvuzajato.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/59260143977.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/jewofudurobexugelole.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_off000058fa.bin
be92cd81583d26d5ae7e70214d41c084fed4c5a0768a526ba8a129d6dcdacef9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FA 5552 bytes
font_01_sfnt_off00006bd0.bin
420b9bc1e4eb66dbb23c5b1ec65533dd495748bf79db180353fffbf80bde7b32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD0 14836 bytes

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