Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a7b18a09651cc7…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 22:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfcc3760f8da4d415dbfad5daf853683 SHA-1: e43346172fdc8485aded9ae974c4771f393a4100 SHA-256: d6a7b18a09651cc724c80535cc9bd08dc8f8042c6dc60bbe55174bd17cbd46a5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a similar URL, suggesting a lure to download content. The presence of numerous external links, many pointing to Shopify, further supports the link farm heuristic. The ML classifier also strongly indicated maliciousness.

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=free+book+folding+letter+patterns+pdf
    • http://files.crumpsalllaneprimary.org/uploads/1/3/1/4/131452938/sobudamelemujin.pdf
    • http://files.isabelledejoyavea.com/uploads/1/3/0/7/130739234/faporob.pdf
    • http://files.amybastindance.co.uk/uploads/1/3/1/3/131380008/baluwunoxuvoxipexiva.pdf
    • http://files.annasoflakeland.com/uploads/1/3/0/7/130739143/83df05793995f70.pdf
    • http://files.artistryofwildlife.com/uploads/1/3/1/6/131636683/9857d78025b00.pdf
    • https://cdn.shopify.com/s/files/1/0436/0673/7053/files/solving_two_step_equations_with_fractions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/general_cytology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/82595467958.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/gate_2020_electrical_question_paper_with_solution_made_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/71977382298.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/website_design_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0431/8806/0321/files/asahikawa_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7577/files/roll20_macro_templates.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/laworazomukone.pdf
    • https://cdn.shopify.com/s/files/1/0437/7706/5121/files/dillon_s_auto_salvage.pdf
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/wikiwilijaponupabuvisadaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/67184781245.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/
    • https://cdn.shopify.com/s/files/1/04

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060a3.bin
3245f6d2d0246f790ed33da8fde2fbc91c0510f8c6e96839dbb3acf31f435f60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5368 bytes
font_01_sfnt_off000072f2.bin
6eb45f10da220ece1c1732123a61da088c2ac747e132862d966de59667f40fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 10428 bytes

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