Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba40361db8a7ec68…

MALICIOUS

PDF

40.5 KB Created: 2020-08-30 10:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e5812c65c8c6ca325991c97242fa460 SHA-1: 8fc07b70fb036fb43e480b0aae54554b9be5b9dc SHA-256: ba40361db8a7ec68cc53a6c0767edb656bff773397ca98c658b65faf6974df72
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though garbled, suggests a lure related to a book title, which is a common tactic for phishing or malware delivery. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

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=introducing+global+issues+6th+editio
    • https://static.usrfiles.com/ugd/e8506d_1b5479f132f0414c911ac0d05c1575fa.pdf
    • https://static.usrfiles.com/ugd/5af86b_1587e200e1d649debb6d6c4362970736.pdf
    • https://static.usrfiles.com/ugd/b8c837_b11fb9b6e82542b783bc017fea5d10af.pdf
    • https://static.usrfiles.com/ugd/b9801a_c2a9f651a84843be96dc6da3c8e400d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2dee4742844a929bfc208d5f93cb2a.pdf
    • https://static.usrfiles.com/ugd/77d535_61b0ea36e2af4483b081c0cb7600b00e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a603dc3220846d0981cb1715f1b9116.pdf
    • https://static.usrfiles.com/ugd/02beb7_96c555fe18764f67b1e84cd142d97d63.pdf
    • https://static.usrfiles.com/ugd/d162e3_13aff1ebb940486f9fbfc324dec5cf7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_889bbe83afd54d46bbfef5d9a3a0254c.pdf
    • https://static.usrfiles.com/ugd/0286dd_bd09146ee2024fbb961d85e0ef5d9fa5.pdf
    • https://static.usrfiles.com/ugd/b8c837_922d640a9751425b9e720093c48995a0.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_off00005fc3.bin
40b5599e3323a5e42f2205c3431e1e79c57838f59d52e9395fab4d7f80ec1bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 5432 bytes
font_01_sfnt_off0000722f.bin
518b8a4fd0c090e046efa170d7c4ee38db11a034bd9577772e884712f19b60a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x722F 10304 bytes

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