Malicious PDF — malware analysis report

Static analysis result for SHA-256 043ff62230314c73…

MALICIOUS

PDF

40.9 KB Created: 2020-08-09 12:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e649ec354a2da03d4cdd7ad52a864b26 SHA-1: e7c718f4244b4889993afcb787313b5bf0dba9f7 SHA-256: 043ff62230314c73a3d84aebde02e9cb035e023ee4e3e43dd632fc1dffdc1854
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The document body and embedded links promote the download of PDF files, disguised as tutorials, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL further supports this assessment.

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=download+adobe+after+effects+tutorials+pdf
    • http://files.athertonymca.org/uploads/1/3/0/7/130740458/zavawuxoxezudokatik.pdf
    • http://tuvum.bj-woodworks.com/uploads/1/3/1/4/131438477/fogoki-pesur.pdf
    • http://files.lenisewilliams.net/uploads/1/3/1/4/131483108/petisojodolixit_xafotetazotowi_vaganeval.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/liwojewovinokarukin.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/jarotaminamavito.pdf
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/90370627551.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/bajofogigotufatuxid.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/8085098352.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/46515955699.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/senememikuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/7152/0414/files/average_of_list_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/panekiwob.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/careless_whisper_sax_sheet_music.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_off000061eb.bin
58dd523999524d20665780d7cfe569a337af0a78d4a39adf30043a4dc6d88c8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 5380 bytes
font_01_sfnt_off0000745a.bin
a5fd41e9608cd9a9a4af65d557b0bb6a9105a1eaf846e55439ac08427cf8b4b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x745A 10164 bytes