Malicious PDF — malware analysis report

Static analysis result for SHA-256 179fa685c7c43a38…

MALICIOUS

PDF

54.1 KB Created: 2020-08-06 12:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9117e7641e05fa6d1c6155d0cfc1558 SHA-1: 2d3bad2f210118b1b4cc11a333fe686cef7d8ce8 SHA-256: 179fa685c7c43a38670a3edc7fb73fac5136b4c9926f71b9020d02dd0a7ffce0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=cardiac+amyloidosis+treatment+pdf'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same redirect URL, suggesting an attempt to lure users to malicious infrastructure under the guise of providing treatment information.

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.cc/pify?keyword=cardiac+amyloidosis+treatment+pdf
    • http://files.pansqip.org/uploads/1/3/2/6/132695568/5115215.pdf
    • http://files.sturtmoorbuhunds.com/uploads/1/3/2/7/132712315/9875414.pdf
    • http://files.rhccfd.org/uploads/1/3/0/9/130969580/mogawenoxorudodijug.pdf
    • http://kamebutid.wrecklessericpaintings.com/uploads/1/3/1/6/131606027/5365546.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/dutisimebovasixenimamagi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1039/files/wonderwall_chords_piano.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/92188205166.pdf
    • https://cdn.shopify.com/s/files/1/0439/7232/9630/files/p90x_workout_routine.pdf
    • https://cdn.shopify.com/s/files/1/0429/9004/3287/files/81135314031.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/66005236514.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/stedman_s_medical_abbreviations_acronyms_symbols.pdf
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/rajot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/61645769786.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/zovudova.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000885d.bin
528f6e2d59c53e7cb9e911febfa39db5764cad8a49ceae2261854e160ba9929c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x885D 5216 bytes
font_01_sfnt_off00009a10.bin
3bb284c78675269dc3a0afb803fa901a6d957235397046b8746f4bc750f31026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A10 10124 bytes
font_02_sfnt_off0000bcc4.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC4 4324 bytes

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