Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6b07cc7ca6f02d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 09:13:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3cf827418084986cf1eb7bb8a3dae8e SHA-1: 94b8cc3d7bd4e2e3cbf729028fd326aa26b6dc77 SHA-256: ad6b07cc7ca6f02d20ca3a477fd5933fc48b443c2037d3c46f09cb1699f6aebb
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at `https://ttraff.ru/wix?keyword=how+to+use+blender+2.+79+pdf`. This suggests a link farm or SEO spam tactic designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=how+to+use+blender+2.+79+pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/sirope.pdf
    • https://cdn.shopify.com/s/files/1/0434/6698/1542/files/95590815701.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4338/files/fallout_4_performance_mods.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/37443293263.pdf
    • https://cdn.shopify.com/s/files/1/0436/1371/6643/files/wudosutunewexulajim.pdf
    • https://cdn.shopify.com/s/files/1/0433/7798/3653/files/79502032625.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/69424552913.pdf
    • https://cdn.shopify.com/s/files/1/0433/1244/7652/files/86516359607.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ee0e4978d2f4d1aa929704d3dc48fbb.pdf
    • https://static.usrfiles.com/ugd/b65acf_8efab3bb03ab40b18538ecc9fd6f88cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ddf75126f074b07850168014014df2d.pdf
    • https://static.usrfiles.com/ugd/804ff6_fe916185e1d84d9eae6cd0f3bae70d09.pdf
    • https://static.usrfiles.com/ugd/7f16bd_4bc8321261884281aedbd288ca7c264e.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/gawagumerigizomem.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/fetaral.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_off0000638e.bin
155f98928ccf2e1ce7e3d63ef89150b108a3ed2b2fe1ae44b55a64adc97c445f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638E 5420 bytes
font_01_sfnt_off0000761f.bin
cc172a7cfe34d333e3e3bf0d5606c7f80e5df73abb97206adb733e9cb0bbe11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 10268 bytes

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