Malicious PDF — malware analysis report

Static analysis result for SHA-256 f336aaee25390533…

MALICIOUS

PDF

41.8 KB Created: 2020-08-06 15:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49cd19a931b50986cf70572b26803434 SHA-1: 84b1612a4bcfe1f5bb4c513006e09f978911213a SHA-256: f336aaee253905333b902889f144c111ecfc548feb89ab01007828973bfe8850
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/wb?keyword=neuralgia%20del%20trigemino%20tratamiento%20fisioterapia%20pdf'. The document body, though heavily corrupted, contains fragments of this URL and other Shopify URLs, reinforcing the link-based attack pattern. 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/wb?keyword=neuralgia%20del%20trigemino%20tratamiento%20fisioterapia%20pdf
    • http://fobukon.gcaseyphotography.com/uploads/1/3/1/6/131606407/titix_mavipo_tivawinej.pdf
    • http://files.attleborodems.org/uploads/1/3/2/6/132695476/226a7db.pdf
    • http://files.thewildwaycoffee.com/uploads/1/3/0/7/130739480/sobuzipo-wonutaduv-woganawe-xofudefiloma.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7394/files/dawewisazarif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/vuxutero.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/nagizejufamina.pdf
    • https://cdn.shopify.com/s/files/1/0434/1448/7207/files/despotismo_ilustrado_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/gerogatofugepowej.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/xunepixekowol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/26433631237.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/57615241116.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/sysmex_hematology_analyzer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9942/2881/files/88148618982.pdf
    • https://cdn.shopify.com/s/files/1/0428/5136/9127/files/21863709712.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_off00006157.bin
100e601af3c73a608e3f9367eff1b75ffa47828fcdee87f54034cade0bcd5c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6157 5328 bytes
font_01_sfnt_off0000736a.bin
d6fc3c3f88a7c5ef9d9ad9a8b41401913371993b7d0ba18183710b877011acec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736A 11280 bytes

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