Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60a75dab0d992f8…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 06:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b31a4fb02e030a8ee5b1bd9a147e92ba SHA-1: 0fac24b2db692f1548d6bf9da24004f94c232349 SHA-256: f60a75dab0d992f8fb733f206c066afaf4728c4097aa8ee7d937ed9e684864bb
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a link farm designed to host SEO-optimized PDFs. One critical heuristic identified a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to a malicious site. No scripts were extracted, and the primary malicious activity appears to be redirection.

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=the+power+of+a+praying+husband
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/6th_grade_math_worksheets_free.pdf
    • https://cdn.shopify.com/s/files/1/0461/4825/5907/files/pawije.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/verbo_etre_avoir.pdf
    • https://static.usrfiles.com/ugd/b85eb0_48a2bf706cc940609b9454873105297e.pdf
    • https://static.usrfiles.com/ugd/41a0b6_82ad9fedd87d47699f89200419081644.pdf
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/juvodatupifosarini.pdf
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/venudajunero.pdf
    • https://cdn.shopify.com/s/files/1/0433/4249/5895/files/42725690712.pdf
    • https://cdn.shopify.com/s/files/1/0431/9176/3105/files/55285907340.pdf
    • https://cdn.shopify.com/s/files/1/0454/5295/1704/files/wamoki.pdf
    • https://cdn.shopify.com/s/files/1/0437/3653/1095/files/gewip.pdf
    • https://cdn.shopify.com/s/files/1/0428/0477/3031/files/59674832598.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_off0000609d.bin
1a3b8dbde652f9dfb282e17a1f0d114c2b9158f5d9c0feb417772ef25088fe0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 5552 bytes
font_01_sfnt_off0000738d.bin
24abf14be1122d6cd3b8b6785256e490f1b66e9e6a696fc1d4c785cfacabf251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738D 10456 bytes

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