Malicious PDF — malware analysis report

Static analysis result for SHA-256 a09675d6cea945ff…

MALICIOUS

PDF

39.7 KB Created: 2020-08-26 07:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cdf2909d741b82a5270423507332e67 SHA-1: 075fd66497747475bf6b1794e7ca9099e5780592 SHA-256: a09675d6cea945ff6c36cb6159cbe8017af20b2ecf0d15017e595af494a871c2
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure (ttraff.cc). The document body, though heavily obfuscated, contains the text 'Ib art comparative study examples' and the URL that triggered the malicious redirector. This suggests a link farm or SEO poisoning attack, where the PDF is designed to drive traffic to malicious sites.

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=ib+art+comparative+study+examples
    • http://xapuru.mysuidora.com/uploads/1/3/1/4/131437626/nonumodawizerafos.pdf
    • http://files.goodatlooking.com/uploads/1/3/0/9/130969200/7445030.pdf
    • http://nuvajobim.officeassetsreused.com/uploads/1/3/0/8/130814017/wadoje-xurade.pdf
    • http://files.freeportautoparts.biz/uploads/1/3/1/1/131163920/sodorugazikab.pdf
    • http://files.thetrophyshopplus.com/uploads/1/3/1/6/131606494/ramubijakovixekikef.pdf
    • https://cdn.shopify.com/s/files/1/0431/2956/9434/files/rurebifibolatawetefogiwew.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/afficheur_lcd_16x2.pdf
    • https://cdn.shopify.com/s/files/1/0434/5623/3638/files/avon_online_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1781/files/10316303709.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/mysql_workbench_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/8710/9023/files/30265002611.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8504/files/36260613657.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/behavioural_design_patterns.pdf
    • https://cdn.shopify.com/s/files/1/0430/8772/4704/files/aashto_bridge_design_manual.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_off00005b52.bin
59961db21065c2d26e9ca487e69680cd5aa16b8975e351057aea61157cf25612		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B52 5528 bytes
font_01_sfnt_off00006e06.bin
a6fdcff2a4c13830cebe2c853b91ac6a73cc88809437948896f686b4cd0be2bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E06 10640 bytes

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