Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9883924c16be74…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 23:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b443d257dde937c2821b2239bbca45b3 SHA-1: 5ae293b2de29e42237377e4575a91cf9994240f3 SHA-256: ff9883924c16be74eb93920d76b58176f3c058feb1dae1ba9fee2693c5fde69f
150 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing links to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on 'cdn.shopify.com', likely for SEO manipulation. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack pattern appears to be the distribution of malicious links disguised within a PDF document.

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/pify?keyword=guitar+pedal+chain+guide
    • http://files.htsi-al.com/uploads/1/3/1/8/131856456/9175008.pdf
    • http://naluj.bonkerforbyram.com/uploads/1/3/1/6/131637789/gobivefisop-pitewaxe.pdf
    • http://files.valleyharvestmarathon.ca/uploads/1/3/2/6/132696483/8157663.pdf
    • http://files.ettuthecollective.com/uploads/1/3/0/7/130740097/tarexumerorasanuwij.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/87777392792.pdf
    • https://cdn.shopify.com/s/files/1/0431/5732/3933/files/terovap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8603/6646/files/data_mining_stanford.pdf
    • https://cdn.shopify.com/s/files/1/0431/0918/7750/files/vegudepamajare.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/fediterew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/vaketojav.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/9899520099.pdf
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/40266277608.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/bugidalapamavuwiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/kikukirometodojanubigoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/da_form_2166_8.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_off00007bbf.bin
d4276a6e6f31f9ae758aba6e2d9e274bd9b8fa7455b1fb1f09cfc40b4a693ead		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 5188 bytes
font_01_sfnt_off00008d58.bin
68c25027bb866b510eefcdfed930605c1cfd7127b087154bb3b7b61e04f8fbc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D58 9920 bytes

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