Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42eebdf4817dd23…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 06:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 406304b8bfbcbd7f5354b68ce9158d36 SHA-1: 3464e73b56aa947405987caa45db77e8b7d3e8d0 SHA-256: a42eebdf4817dd231f3c70fb9710c8d97649221df8067f7f80eb762a8d46511f
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains hosting other PDF files, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, indicating the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted from this sample.

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=headbands+bob+lyrics
    • http://files.kathleenrupff.com/uploads/1/3/2/7/132740852/fbd3c2d16.pdf
    • http://files.oregonepermitting.com/uploads/1/3/1/4/131437724/tenemofufofo.pdf
    • http://files.southslopepediatrics.com/uploads/1/3/0/9/130969791/f8ef85fe.pdf
    • http://files.samanthadasilva.com/uploads/1/3/2/6/132682640/miwide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6385/2708/files/logibivufogawalozap.pdf
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/lomipikasovagop.pdf
    • https://cdn.shopify.com/s/files/1/0429/4007/2092/files/zifap.pdf
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/85305047306.pdf
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/43368188678.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/xijunokidovovevagewag.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/28375904841.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/lidipajezisome.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/carson_dellosa_math_5th_grade_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2120/4631/files/vexiger.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_off00006360.bin
c1aebdaa536f1133ca35f3806e708fb107b2b2c2b36182d31527c1596f10fa84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 5136 bytes
font_01_sfnt_off000074e4.bin
284761d0c27806cb032b5f70f194f2bbd75e0e084c91a7e6469ce3726f8a4ac6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 10084 bytes

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