Malicious PDF — malware analysis report

Static analysis result for SHA-256 b34aaf269986baa5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 06:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b618315de70c64c70cb94ec762be50a4 SHA-1: f759b89476748e685c1ee6aae66e33fb1f09167a SHA-256: b34aaf269986baa588ae1712d7aa5e932c6c5ed34e89fcb31dd486759be7bf33
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains URLs that are consistent with the heuristic findings. The primary malicious URL identified is ttraff.com, which is known for redirecting to malicious content. The presence of numerous links, many hosted on Shopify, suggests an attempt to distribute malware or conduct phishing through a large-scale link farm.

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/wb?keyword=assistance%20dogs%20international%20public%20access%20test%20pdf
    • http://files.stmarksaurora.org/uploads/1/3/0/7/130739301/3074921.pdf
    • http://files.abbottconstruction360.com/uploads/1/3/0/7/130739340/7422542.pdf
    • http://files.clementscommunitychurch.com/uploads/1/3/1/8/131856158/8884960.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/tanivugukanigifavixigar.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/86159700396.pdf
    • https://cdn.shopify.com/s/files/1/0439/0879/2475/files/nowowemaruzir.pdf
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/mavukajudij.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/93703516654.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/17526358836.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/11259423342.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7562/files/raperexexutelul.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/tabla_de_derivadas.pdf
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/gta_5_prop_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8027/files/veridevogebibele.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_off0000646c.bin
9c6aa51bfaffb3ef05e8da28b2d58caa09e8f41a52f4917a21e330506e96ed1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646C 5452 bytes
font_01_sfnt_off000076f9.bin
f80af60de7a987ea31983ee3cb69efba9c3c74270cd5245f3114b6cef7396951		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 10172 bytes

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