Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb85f34290464e0…

MALICIOUS

PDF

49.6 KB Created: 2020-08-15 20:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6623cc4c20c2390530516c84926a556d SHA-1: 9c9f6ed5fd27d1c168832177877aff4db98f5e11 SHA-256: fcb85f34290464e088a8b9c58705dddc29a7ba5d94cbefbd40f7240364909d52
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.com/wb?keyword=basic%20algebraic%20geometry%202%20shafarevich%20pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The file's structure and link farm indicate a delivery mechanism for further malicious content.

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/wb?keyword=basic%20algebraic%20geometry%202%20shafarevich%20pdf
    • http://files.flbutterflyeffectboutique.com/uploads/1/3/1/3/131378771/pefipenok.pdf
    • http://bazoduw.thinktankinvestmentgroup.com/uploads/1/3/1/1/131163763/201651.pdf
    • http://boragot.stmaryslee.org/uploads/1/3/0/7/130738524/zilokasogi.pdf
    • http://boragot.stmaryslee.org/uploads/1/3/0/7/130738524/zilok
    • https://cdn.shopify.com/s/files/1/0427/6443/5612/files/30952425183.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7034/files/50171561858.pdf
    • https://cdn.shopify.com/s/files/1/0432/5195/7923/files/49751942901.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/48183034156.pdf
    • https://cdn.shopify.com/s/files/1/0440/9776/5528/files/90665970978.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/carbohydrates_classification_and_function.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9367/files/pokemon_ranger_shadows_of_almia_browser_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/tujesig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kulabegidubonigupux.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_off00008271.bin
0d1a0f48afb860c62a325c8af1b99ca35e39961342b55cbc3f5e329e01c97f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8271 6052 bytes
font_01_sfnt_off000096e9.bin
4c2730b32412fc528a65ddb61e42df1b4a14aac28f2e790f650988382950cefc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96E9 10120 bytes

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