Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d659ab416fe657…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 12:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cc5b76e4fe46e90816657a80c18f066 SHA-1: fc8117e0a722b5678a6747f725cfd4cadc5f4630 SHA-256: 33d659ab416fe65747b5deef385ea24b35d4e864750a345a61b5b24fbd22a4d1
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=bearing+angles+worksheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Bearing angles worksheet', suggesting a lure to disguise the malicious intent. The presence of numerous Shopify links, while mostly benign, contributes to the link farm characteristic.

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/pify?keyword=bearing+angles+worksheet
    • http://wumam.wendyvanderdrift.com/uploads/1/3/1/4/131407711/leviwapega-bejisasaga-wufuliron.pdf
    • https://cdn.shopify.com/s/files/1/0432/2908/5859/files/1861416163.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tolipokegegami.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/db_legends_mod.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/diguwixidafe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4567/4389/files/15739988504.pdf
    • https://cdn.shopify.com/s/files/1/0448/0575/0946/files/character_sheet_creator_online.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/critical_theory_tyson.pdf
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/technical_drawing_with_engineering_graphics.pdf
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/tekepegoreb.pdf
    • https://cdn.shopify.com/s/files/1/0438/2729/8461/files/lenotejejexixopuvukat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8191/5804/files/67523427990.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/calculus_and_analytic_geometry_by_howard_anton_free_download.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/
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/critical_theory_tys

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a0.bin
86b5d8f7b7e335f36562a9e838a0e64e754d08e21304f77777292dcba0eed18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A0 5152 bytes
font_01_sfnt_off00007332.bin
e8682180dd21f965203569666758888608ec14f2bdf9646fc4d694c595f6bb2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7332 10192 bytes

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