Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0b6d95e7847057…

MALICIOUS

PDF

41.1 KB Created: 2020-08-14 22:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3a360360af3f92f05375d2618b32f04 SHA-1: 0fd9e218120235767c12cb13edbb67cf66b5a3fe SHA-256: 8c0b6d95e7847057e1636b08e23a2a869a94ddbc4bb8cdae65994ee989067117
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=cinema+4d+r20+update'. This URL is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body also contains this URL and references a 'Cinema 4D r20 update', suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning or distributing malicious content.

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=cinema+4d+r20+update
    • http://files.board.solonchamber.com/uploads/1/3/0/8/130814611/ea8cd82f55.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20116177671.pdf
    • https://cdn.shopify.com/s/files/1/0434/0537/7701/files/susijo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2177/7570/files/logigokuvabafenuzegoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/9810587140.pdf
    • https://cdn.shopify.com/s/files/1/0441/1061/0584/files/93408942641.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1669/files/4843159609.pdf
    • https://cdn.shopify.com/s/files/1/0430/1147/3571/files/livizagibapoxes.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/arbitration_law_reporter.pdf
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/posapuraledimazixowapam.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_off00006358.bin
90aa9837d75b899cd9086543202b53123f48eed04448f67f3bcfddb9887e39df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 5160 bytes
font_01_sfnt_off000074c2.bin
1437da1b510489f2445ef43cdb32d7f8c540aa71f8e5fa0547c6baced6246a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 10520 bytes

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