Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fa929a42b51416a…

MALICIOUS

PDF

46.5 KB Created: 2020-07-31 14:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 433d6340292a6d452fcb173f09a32718 SHA-1: 5e43116cb48323839a9cb33eeeb264d69fe7f154 SHA-256: 0fa929a42b51416a7c6a8e230bc954d738fedecbed24983913784f26c2a85ac1
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a redirector link to 'ttraff.com'. Another heuristic indicates a large link farm, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=a+view+from+the+bridge+revision+guide+pdf
    • http://files.wesparklearning.com/uploads/1/3/1/4/131482950/b5457a5e4fa92.pdf
    • http://files.pjcarradori.com/uploads/1/3/2/7/132740399/4641bfdd19b25ce.pdf
    • http://files.hartshillandharpfieldsra.org/uploads/1/3/0/7/130776150/1185917.pdf
    • http://files.sarahmulderpsychology.com/uploads/1/3/0/7/130739214/3396642.pdf
    • http://files.hillfarmhistoricalsociety.com/uploads/1/3/1/6/131636941/774516.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/3111494265.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/tunijuxuvaxazutaxopal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mufuma.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/26874400486.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/41361905806.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/dapurizozewalazekotazu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/41526305382.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/8359077993.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9065/files/48372415980.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/80315618544.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5098/files/49816061651.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007799.bin
36091d238eb78605cc1dc2fafc595bda05685009e03c5567ce764fd3af43e31c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 5376 bytes
font_01_sfnt_off000089d5.bin
57b88432d56c9562d8bc856585fa1e27f2127ec8bd720bfdcb982b11a6f5bb08
pdf-font-stream PDF embedded font (sfnt) at offset 0x89D5 10336 bytes