Malicious PDF — malware analysis report

Static analysis result for SHA-256 b141decf830668c1…

MALICIOUS

PDF

53.2 KB Created: 2020-08-30 23:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: beafc543178dcb9586163f282bc75429 SHA-1: 884de44594d621c7c25d9b8521d5454ea9e292a8 SHA-256: b141decf830668c1bdedd6736f94a0a61f5c300f3d9fd14eb18a5249844c2291
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=poke++++cydia', which is associated with malicious redirector infrastructure. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic, potentially to distribute further malicious content or to obscure the true origin of the malicious redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=poke++++cydia
    • https://static.usrfiles.com/ugd/0c268c_251d61591fac46eca348a6e72f719941.pdf
    • https://static.usrfiles.com/ugd/7598fa_73988b81c1df494f97a06678b761faac.pdf
    • https://static.usrfiles.com/ugd/b8c837_de4b68173cf7430ba8f07f3740fed396.pdf
    • https://static.usrfiles.com/ugd/0d002d_1bd49012247c49fd92f8c8a72a9f044c.pdf
    • https://static.usrfiles.com/ugd/374ce0_d87b1141a83d43f09cfa1d5be5a92839.pdf
    • https://static.usrfiles.com/ugd/ae15ca_544394cfa3c2426f8fbbfe67a6bbd65c.pdf
    • https://static.usrfiles.com/ugd/09c3c7_ab36af9b85c345df88ca5445c0ac17c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_aab46271fa4b4c2c8da4aa8f71a5113e.pdf
    • https://static.usrfiles.com/ugd/0b46e6_337926d80bc342f0af409ca51cfdb0fe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7736/files/sijur.pdf
    • https://cdn.shopify.com/s/files/1/0438/4129/0397/files/byomkesh_bakshi_bengali_serial_all_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0436/9511/2345/files/indicateur_de_tendance_centrale.pdf
    • https://cdn.shopify.com/s/files/1/0433/9249/9868/files/kenezazol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6948/files/viputew.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_off00009436.bin
e7fa6df4fbbb069d6b2d8506aff87be255abc7b05dd819e1bcc59fef13b982bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9436 4792 bytes
font_01_sfnt_off0000a49c.bin
e0f015d87a22d9a06b6633b7083af067c4a529f98cbc0a3263df0e52a5730752		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49C 10476 bytes

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