Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8bbe0779c1df6a…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 21:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ca32367ab0fb88c5090b2bb5b6e6ee4 SHA-1: 0faabd49e40a04670a327882616eab25dbded826 SHA-256: cb8bbe0779c1df6acf8b453dd9b64ab90eb57ad5914a1ef64365b4b620575669
120 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-Ins T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, disguised as a medical manual. This heuristic, combined with the presence of a large number of embedded links, suggests a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. 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.cc/wix?keyword=washington+manual+of+emergency+medic
    • https://static.usrfiles.com/ugd/36f25b_128f625806bc4a13996112b7c5ce6c24.pdf
    • https://static.usrfiles.com/ugd/1b8612_85296dc305364f9eb5c60b379814922b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b163dd7a12994e479ffc31d4ffef78a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b4e67165c1340dc9c99ea615bc83a72.pdf
    • https://static.usrfiles.com/ugd/b0b521_d201bb7cae5c4d228f51448e5c48dc58.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/cabin_crew_safety_training_manual.pdf
    • https://cdn.shopify.com/s/files/1/0461/0690/2691/files/gudinonumamu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/83756949414.pdf
    • https://static.usrfiles.com/ugd/cf79db_79da65c18763418b91db471fc74ebbdd.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_e52a1372b39442d287d4cfad67aea20f.pdf
    • https://static.usrfiles.com/ugd/cc14e4_1063f028247c4ec3b899101814e04714.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_off0000635e.bin
86152d63d342ae54d0132f87d9093bddc162b4476d6646fb919aead7f5e774cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635E 5548 bytes
font_01_sfnt_off00007618.bin
f90610a229fe189ee150115c1ff37577df4e45a5a5576ccd6c159291eb4b799f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 15128 bytes

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