Malicious PDF — malware analysis report

Static analysis result for SHA-256 08aecd9e35b660b1…

MALICIOUS

PDF

37.8 KB Created: 2020-08-11 07:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e026a53f53768c190b4432fcea210c3 SHA-1: c34cf76e6b668a6e24ee0bc51516689a6453dc00 SHA-256: 08aecd9e35b660b136cb02e20bd0ca6360d73797f4eef367b6b7b4c2c3f709b2
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a known malicious redirector at ttraff.com. The document body, though obfuscated, contains the same URL as a lure, suggesting an attempt to direct users to malicious content. The ML classifier strongly indicates maliciousness, and the presence of many PDF links points to a link farm or redirection strategy.

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=error+analysis+in+english+pronunciation+pdf
    • http://files.christianawt.com/uploads/1/3/1/3/131398091/c9c128656ecfea.pdf
    • http://files.youshouldvisitjapan.com/uploads/1/3/0/8/130814169/fepav.pdf
    • http://files.northernpridesportsacademy.com/uploads/1/3/0/7/130740260/kilogerezogibaj.pdf
    • http://files.barcelonaplanetfilmfestival.com/uploads/1/3/1/3/131379743/sifawowojaziso_rafew_jawenitujisole_mixed.pdf
    • http://files.heartxoutfitters.com/uploads/1/3/1/3/131380063/946f47fb1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/53808155861.pdf
    • https://cdn.shopify.com/s/files/1/0431/8262/0834/files/3692326175.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/vidibaligofilenaxur.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/xaxadobolawidoxexajagoxed.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/mulixudiwewaxune.pdf
    • https://cdn.shopify.com/s/files/1/0431/6751/4788/files/92570632991.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/70463565271.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4368/files/bearded_devil_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/free_printable_letter_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0449/8325/5198/files/how_to_add_bookmarks_to_adobe_acrobat_dc.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/2597779946.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_off0000548e.bin
582b526e674d91ffe6c5aa722103aecffcb4bcb4e7cb9152b89c6cb87fbabe34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x548E 5476 bytes
font_01_sfnt_off0000672c.bin
87eba9fe4ea8bfea9741204c072ac3f3acc87277fcd9c328e4235000a728a134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 10340 bytes

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