Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0fcc84f9799da94…

MALICIOUS

PDF

40.1 KB Created: 2020-08-15 00:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac7a46e8dbbd3be345287511aa871430 SHA-1: 7da94376348d66e4395f7a6e5bb0ffed9ccda511 SHA-256: d0fcc84f9799da948d694814ddbbf3cebd22ae606f15c41da51bf482f9385235
150 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination. Another critical heuristic indicates a PDF link farm, with many links pointing to Shopify-hosted PDFs. The document body contains garbled text but also includes the URL that triggered the malicious redirector heuristic, suggesting a lure to external content. The primary attack pattern appears to be SEO poisoning or a link farm designed to direct users to malicious sites.

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.cc/pify?keyword=vba+list+all+sheets+in+workbook
    • http://xadeve.donkeytalkshop.com/uploads/1/3/1/6/131606490/b1d8c.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/dizobuloxibiremobupagidot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0523/8692/files/23568949941.pdf
    • https://cdn.shopify.com/s/files/1/0430/5564/4823/files/switch_case_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/tazevorepibegubabutobesal.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/8367561821.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7101/9935/files/93587526477.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/inuyasha_season_3.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4971/files/dedisumab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nomevorijodasulalo.pdf
    • https://cdn.shopify.com/s/files/1/0438/6075/4592/files/vatero.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8548/files/mamagemokuminuliwojaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/zubob.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_off00005fe6.bin
9897b26d71d92d79769b97b0ec04f1a23e9742c3120e596ede921d14932b387a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 5036 bytes
font_01_sfnt_off00007109.bin
19f6199a3ddea4c3c5ed2143624e7acae116bd39f260156745084c36f857a426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7109 10216 bytes

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