Malicious PDF — malware analysis report

Static analysis result for SHA-256 927afcb42dcf23ff…

MALICIOUS

PDF

40.7 KB Created: 2020-08-19 03:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22019dd140b226b968e056a5498ff785 SHA-1: f0515ffdea59aa03fe7504af3ebd8a354d45dd24 SHA-256: 927afcb42dcf23ff512ed2df9737b5136ccb3c370584881a7b5152db2fb3a2f8
154 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, with a critical heuristic firing for a PDF link to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=admin+panel+template+codepen', which is also listed as a malicious redirector. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm intended to distribute traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=admin+panel+template+codepen
    • http://fogamul.pierreloiselle.com/uploads/1/3/2/6/132681556/3149865.pdf
    • http://files.pamswaycreations.com/uploads/1/3/1/1/131164202/lipoboromofe-jurosupiju.pdf
    • http://zawevoxo.chadgmalcolm.com/uploads/1/3/0/8/130814328/9420646.pdf
    • http://files.seoidproductions.com/uploads/1/3/0/7/130740412/338e34beb0.pdf
    • http://files.mayahabian.com/uploads/1/3/0/8/130815437/mokaputevojok-dikuxomafelaf-gupujeliloso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/92143606868.pdf
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/39071219370.pdf
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/angry_birds_2_images.pdf
    • https://cdn.shopify.com/s/files/1/0437/3030/5178/files/dabinidozevoraritaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/38218894603.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23063093424.pdf
    • https://cdn.shopify.com/s/files/1/0436/4566/5433/files/buzasewumegera.pdf
    • https://cdn.shopify.com/s/files/1/0448/3029/4177/files/japan_rail_pass_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/xisimisiru.pdf
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/sharh_aqeedah_al_tahawiyyah.pdf
    • https://cdn.shopify.com/s/files/1/0435/0800/7072/files/wujererigutakodiwiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/1449/6161/files/public_health_merit_badge_book.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_off0000595d.bin
b3d619ad5cf54336f209a5a6a5dbd1bb85154936fcdf0fad0bf72ec9c47f425f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595D 4936 bytes
font_01_sfnt_off00006a07.bin
a760a999434ff8e76a28cb67f31b8cd176505ef66489e7309f7627d4fa514a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A07 13732 bytes

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