Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d931c66fd6814da…

MALICIOUS

PDF

41.6 KB Created: 2020-09-09 03:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96c8b0cb132301776668579faaa4f7a1 SHA-1: 436968909a9cc8d81e373933bed68a96b434229b SHA-256: 1d931c66fd6814dac5982cab3b9003099b8dffd8361a5b19cfd265ea94ef5152
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a link to 'ttraff.club' suggests an attempt to lure users to a malicious site, potentially for phishing or malware delivery. The document body contains garbled text and a repeated URL, further indicating a non-legitimate purpose.

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.club/pify?keyword=aua+guideline+antibiotic+prophylaxis
    • https://static.usrfiles.com/ugd/b8c837_053c0258328d466fb7a69ceb52b4bdd0.pdf
    • https://static.usrfiles.com/ugd/af0aa9_224a4e6020314bc79e8df25a52f1dc25.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_e677e9a8ad9b4b7cafa52d8388376bc2.pdf
    • https://static.usrfiles.com/ugd/0adedf_a23e5fcf748c45e9b6c6a01e8402e414.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a73af7e2b0f4ecca4c2399887728be6.pdf
    • https://static.usrfiles.com/ugd/740d8c_712c39cc1aca45ecad0c577e3afd2a8c.pdf
    • https://static.usrfiles.com/ugd/f95141_ec33f1a3870644a4868e21d63dfd4789.pdf
    • https://static.usrfiles.com/ugd/3e7897_adb904f1495340459fc7213dec766c9c.pdf
    • https://cdn.shopify.com/s/files/1/0433/3010/9593/files/sijuxefin.pdf
    • https://cdn.shopify.com/s/files/1/0439/3625/2072/files/baahubali_2_movie_songs_free_starmusiq.pdf
    • https://static.usrfiles.com/ugd/bfbc46_6344a6d30b4045d9aabdead1076e716d.pdf
    • https://static.usrfiles.com/ugd/96bf9d_876cb470ae6b46c9a13cef729979cd65.pdf
    • https://static.usrfiles.com/ugd/7c3584_f5281432ff894cb7adc537c3eca4b554.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_off00006286.bin
e7c9d637729d7b9bbc7fdd43b6c97be85c4b2387b97e3e09a75afe646ba40331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6286 5636 bytes
font_01_sfnt_off000075af.bin
a10d5e652039a8d621fb2185acecac4b982a67c08506a22b94176e5fb78c1d9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AF 10572 bytes

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