Malicious PDF — malware analysis report

Static analysis result for SHA-256 772c1d4973eb2a40…

MALICIOUS

PDF

52.7 KB Created: 2020-08-07 09:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc101438e2283be2328155e4d974bef8 SHA-1: 7ee84d5cb0dbc0fea6b0a005af07361bc9431e1c SHA-256: 772c1d4973eb2a405a861b0964a1f40bd4fd7efe8494c81144def17821656ff1
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=learning+robotic+process+automation+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to external malicious content. The presence of a large number of PDF links further supports the classification as a link farm designed for malicious redirection.

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=learning+robotic+process+automation+pdf
    • http://files.hilltopangusfarm.com/uploads/1/3/1/4/131408086/dukanifixobizug-kogasidige-jobix-fisuzodogole.pdf
    • http://xosikab.briggslambandmutton.com/uploads/1/3/1/3/131383664/7106699.pdf
    • http://files.wilcoxwellnessfitness.com/uploads/1/3/2/6/132681560/lefabuwubi-weziko-falase-tisev.pdf
    • http://files.carlyhines.com/uploads/1/3/1/4/131437889/948e3e828dc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/pugobiposikodilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wixedazatujiguxup.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/jetibefo.pdf
    • https://cdn.shopify.com/s/files/1/0450/1143/5670/files/free_beginner_guitar_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0436/1230/7618/files/cracker_barrel_menu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/calculus_early_transcendentals_2nd_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/mireb.pdf
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/how_to_make_cucumber_kimchi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3444/1885/files/xokasubuxofopunejitememej.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_off00008145.bin
82a299ed9147b59a3663e379b1d3063f79e9017457a08d6eb1fdd7e8378d64b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8145 5404 bytes
font_01_sfnt_off00009381.bin
695eed71c98f231c0146844e3ec6ac218a124ee860ca69756828328ebdb2a142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9381 10452 bytes
font_02_sfnt_off0000b723.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB723 4324 bytes

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