Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb78ce9b8ff385a2…

MALICIOUS

PDF

44.6 KB Created: 2020-09-01 00:55:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bad0714bd28c7a776f8e0fbf7dae1834 SHA-1: 05ad8d23018f9c8223242deb16b57dab265f9e30 SHA-256: eb78ce9b8ff385a2497feeacc3aedf645e86ff92a5ef9e18372826d4a9d0029a
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a deliberate attempt to lure users to a potentially harmful site. No scripts were extracted, and the primary malicious activity appears to be the redirection via the embedded links.

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.com/wix?keyword=arunachalam+tamil+movie++mp4
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/dureseguxolujuxodid.pdf
    • https://cdn.shopify.com/s/files/1/0434/4948/3420/files/12952966641.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1104/files/nonlinear_functional_analysis_a_first_course.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac91687b732644d1821dfdf29abd2de2.pdf
    • https://static.usrfiles.com/ugd/455f95_761788994c4546ab8ba66a52556bc9f2.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/a_rocking_horse_winner.pdf
    • https://cdn.shopify.com/s/files/1/0434/8998/4678/files/benedict_anderson_comunidades_imaginadas.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/latest_jobless_claims_report.pdf
    • https://static.usrfiles.com/ugd/6290de_221011fe28bf4fb7afd55a9134e1af2a.pdf
    • https://static.usrfiles.com/ugd/d902bb_6c02996fd6bb480bb95d991700d25808.pdf
    • https://static.usrfiles.com/ugd/221f3a_bc2a3c4fa7fa4181badbe73bc0275d65.pdf
    • https://static.usrfiles.com/ugd/d3758e_f48194642c9244ef826cd769edd5c4c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8010d0e50c94d93b985fc036080c50c.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_off000071e6.bin
fc1e94d90e86b2aeead82c5f1d8e756695c261af01b8f24f8c8d0bee353e6bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6 5132 bytes
font_01_sfnt_off0000833e.bin
107e8d01a3ede417a94c61445340e5c808872a5e607079ef180d99088fe73d3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833E 10188 bytes

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