Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7159b9439834738…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 13:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93281275bfeff8184fdf20f6715a5bcd SHA-1: 54335b8e5c1a6f11973cbaf1caf035db6a0ea472 SHA-256: c7159b94398347381df3873c5614fdf0edd1715ad89551ea92bd7c99120c790e
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to direct users to a malicious redirector at `https://ttraff.ru/wix?keyword=segment+break-even+calculations+include`. The document body, though heavily obfuscated, contains references to this URL and numerous other PDF links hosted on Shopify and static.usrfiles.com, suggesting a SEO-based lure to drive traffic to the malicious redirector. No scripts were extracted, and the primary malicious behavior is the redirection via embedded links.

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/wix?keyword=segment+break-even+calculations+include
    • https://cdn.shopify.com/s/files/1/0437/1460/9305/files/guidelines_metastatic_prostate_cancer.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/16147392792.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/gitagirijofulogowep.pdf
    • https://static.usrfiles.com/ugd/895bef_2220dd7d32324788bdb1024c0b98e266.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f1b2fc291d84aa599e22554a97cf840.pdf
    • https://static.usrfiles.com/ugd/b8c837_82e8055f5a22495692bf1ad55f98445c.pdf
    • https://static.usrfiles.com/ugd/ade4e6_c04726078b5a42e3ba1578faca329a90.pdf
    • https://static.usrfiles.com/ugd/b8c837_c03b92a567b24e02867ff4b7cdb0cf4c.pdf
    • https://static.usrfiles.com/ugd/a86d68_8cd45df800a44e77959deec767b9182d.pdf
    • https://static.usrfiles.com/ugd/b8c837_9626813987cf4cf2a2853db0e124cfbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_5bd8a78e42484b0187cfcc6f3640ee6e.pdf
    • https://static.usrfiles.com/ugd/b8c837_c17d130facb3441690e2030855741e61.pdf
    • https://static.usrfiles.com/ugd/6290de_8e4c976146bc434887917f07a833490a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1691e67d3f74d2f8ec86ef5bf96dfe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_7716abd5297f4629bca5cf08fa05de70.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_off000059ad.bin
4cbde48f3e05f5799637b5118dac62516b362ee723c11dbfbe80c8dc7a316f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AD 5660 bytes
font_01_sfnt_off00006ce2.bin
918cc3616aeccfd96b740a24b3b4983b858da5481596637fe82ef9a936843db6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE2 13984 bytes

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