Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f2441e8b75a1aae…

MALICIOUS

PDF

33.5 KB Created: 2020-08-05 11:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 574f6eb5a0c93bc87f0321804101b2e0 SHA-1: 8ddf54c44116a807448ec2c13bb2efc46722917d SHA-256: 8f2441e8b75a1aaed28e58aee41d392184d4ff4e034e4b3a9d1fe523f0f69ae5
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This suggests the document is designed as a link farm to obscure malicious destinations, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains the target URL and other PDF links, reinforcing the lure.

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/wb?keyword=sociology%20a%20biographical%20approach%20pdf
    • http://nidofip.thedoosra.net/uploads/1/3/1/0/131070786/kovogevo.pdf
    • http://files.milanibowhunting.com/uploads/1/3/1/8/131855992/b16a699.pdf
    • http://files.monicacarrollart.com/uploads/1/3/0/7/130738836/busonone.pdf
    • http://files.iwritebookspub.com/uploads/1/3/0/7/130739747/welanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/lojud.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/52781619858.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6327/files/6256702495.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/bihar_tet_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/fuvivigiti.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0927/files/tebiguweni.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7904/files/bedelix_notice.pdf
    • https://cdn.shopify.com/s/files/1/0433/6523/6895/files/5416954891.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/makupefabesuku.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_off000043db.bin
80a15072123696b0f98aa978cc09930d788e32f399d9618fda32a7cce97fccc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43DB 5584 bytes
font_01_sfnt_off000056d4.bin
340682be5cc01a3bf85a7d2c5c5f73fd00cb8a10860081577b510d9f0c9edb32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D4 10164 bytes

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