Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a22d88f239a6977…

MALICIOUS

PDF

44.8 KB Created: 2020-08-15 08:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee43c99242640bcfbc66619aa74893de SHA-1: f4433ff88ddbe0b8872f437eeff63abbca31c811 SHA-256: 3a22d88f239a69772658fcd7853d5b95af7c228be170b718b8ad6c879d335024
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body also contains the same URL, disguised with a lure related to 'Spectacular Spider-Man'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many of which are hosted on 'cdn.shopify.com' and appear to be generated SEO 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=spectacular+spider+man+full+episodes
    • http://ditef.srhair619.com/uploads/1/3/1/4/131406893/wupibarinezuvovina.pdf
    • http://files.tworiversrecovery.com/uploads/1/3/2/7/132740860/91cf8adff.pdf
    • http://files.guerrerohairstudio.com/uploads/1/3/0/9/130969885/1823195.pdf
    • http://files.historyleadership.com/uploads/1/3/0/7/130776120/zeletevubazoku-limanaduwix-wuwulixipiza-vadugoxo.pdf
    • http://files.rkspeech.com/uploads/1/3/1/4/131438249/9075954.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/fajonasodonevaseragit.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9698/files/socrates_books_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/57241915246.pdf
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/solving_and_graphing_compound_inequalities_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/bca_1st_year_books_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/13704422431.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/doloxazunuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/54194223529.pdf
    • https://cdn.shopify.com/s/files/1/0437/6346/6391/files/36791766221.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/ball_badminton_new_rules.pdf
    • https://cdn.shopify.com/s/files/1/0436/1266/8066/files/13203657319.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/understanding_business_free.pdf
    • https://cdn.shopify.com/s/files/1/0449/4534/2619/files/que_es_amenaza_de_parto_pretermino.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_off00007043.bin
c24697b02f2b1f84e98b1c7736c8be665ad6e575dde8120d757100d6c1acc1c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 5404 bytes
font_01_sfnt_off00008287.bin
32f2cac539cf035cf254fdc194fec4068d2bb31bb1c3e36d6d1a61e874db8fdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8287 10956 bytes

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