Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f4c6b3f9159073…

MALICIOUS

PDF

53.2 KB Created: 2020-08-01 22:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 461fb540edc6fcbfcac410d53b8e35d2 SHA-1: 57c02c2b7752800a502c63ac3fca99095064f022 SHA-256: a5f4c6b3f9159073a7b5fc4326b7db13c30906685d6ef30a581b44049a9bb884
120 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=mechanics+of+materials+8th+edition+pdf'. The document body, though heavily obfuscated, contains text related to 'Mechanics of materials 8th edition pdf', suggesting a lure to entice users to click the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector.

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.cc/pify?keyword=mechanics+of+materials+8th+edition+pdf
    • http://files.watsonhill.com/uploads/1/3/0/7/130738621/wisezawu.pdf
    • http://files.udderlygorgeous.com/uploads/1/3/2/6/132681826/kekojuzakidegutew.pdf
    • http://files.ginaniebergall.com/uploads/1/3/1/4/131453633/likowiwekurogelukadi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/16235922513.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/mavudifajorazowax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/61045813552.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/41437207892.pdf
    • https://cdn.shopify.com/s/files/1/0435/4434/6792/files/tinuxafafiporafapoxikez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/xetajizedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/wodoterukegesiti.pdf
    • https://cdn.shopify.com/s/files/1/0435/5840/4245/files/xavefegugo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6794/9724/files/24445289624.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/biwuvakurivi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/76408514438.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/sivaxevekidukesexudutal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/fijavewufezixepuw.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_off00009181.bin
9458739f79e310f986118b47e76ac346f5b540836bf3620d1cef7821ee8b3033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9181 5592 bytes
font_01_sfnt_off0000a46a.bin
572fcdcc66beaebe90f978dc550c60a033705c5f72274a096edcbae0cc94e2e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46A 10284 bytes

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