Malicious PDF — malware analysis report

Static analysis result for SHA-256 317b837febf05a90…

MALICIOUS

PDF

40.9 KB Created: 2020-08-30 12:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ea6fb98b5df139dc4c5ca3ebd6758ea SHA-1: 8a2f19e9f06086e1659ab85eb8be4033db454c68 SHA-256: 317b837febf05a90b51de504b1b2f25e9054387fa91c2a75ed688a1212cbfbb9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO spam and malicious redirection. One critical heuristic identified a link to a known malicious redirector infrastructure at https://ttraff.ru/wix?keyword=ambulance+driver+handbook, disguised within content that appears to be an 'ambulance driver handbook'. The document body, though heavily obfuscated, contains this URL, suggesting the primary intent is to redirect the user to malicious content. The presence of many PDF links also indicates a link farm strategy.

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=ambulance+driver+handbook
    • https://static.usrfiles.com/ugd/b8c837_3009db3f9801433da76a57a9ab8f5326.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d9a5dc6c114c009b489c546dfeb623.pdf
    • https://static.usrfiles.com/ugd/804ff6_70bde35ccf9149a68bb501b4b388a468.pdf
    • https://static.usrfiles.com/ugd/b8c837_928d4ae96bb3437abc9af4af673dde39.pdf
    • https://static.usrfiles.com/ugd/b8c837_3812a23079d74b67bbe662700c4bc0bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d36f160296b48f5a4eb1185357e8ee0.pdf
    • https://static.usrfiles.com/ugd/72b0e7_231b2162670443f494d72823ee6d0abc.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4549/files/roman_aqueducts_and_water_supply_hodge.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/26418764074.pdf
    • https://cdn.shopify.com/s/files/1/0448/7512/0807/files/arm_microcontroller_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://static.usrfiles.com/ugd/5af86b_08ed9b61350e47f69c39ed670392f9b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f45ee15d0da44aeeae51d85a94ec3e0b.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_c3c2376ae67d464898afebcb1a36d0ab.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_off000063cc.bin
296572d4808cd495403618550f14baf5437e417625d9cdb58c8082a753d032d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CC 5256 bytes
font_01_sfnt_off0000756d.bin
8f24482aa5d6ecc68f131645bc5ec57420cc8c9d9702e9f39a4cad42ea988aec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756D 9844 bytes

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