Malicious PDF — malware analysis report

Static analysis result for SHA-256 793ea2d7e8fa3122…

MALICIOUS

PDF

33.5 KB Created: 2020-08-29 19:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8e25cec6f41f1550b0ef62fc93ca0a9 SHA-1: 4fdf1a7090dd4125718643f1394f26c6a6aa36c8 SHA-256: 793ea2d7e8fa31226c34a6ae61426690a0bb11b366d9b0e0ea222e102598f434
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to deliver a secondary payload. The document body and embedded links suggest a lure related to 'No Man's Sky' to entice users to click the malicious link. The presence of numerous PDF links, many pointing to benign Shopify domains, indicates a link farm strategy to obscure the malicious destination.

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/wix?keyword=no+man%2527s+sky+crystal+sulfide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/84368738446.pdf
    • https://cdn.shopify.com/s/files/1/0434/6524/4832/files/tawen.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1871/files/42192487660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/fracking_news_reports.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/non_steam_games_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_2557c9c2e7c54dcfa55cde441819b30e.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ccba908413f4b75b4dbe3ec35274bd2.pdf
    • https://static.usrfiles.com/ugd/b8c837_83b5581846904130aa0d4c35885f5f10.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/40142212888.pdf
    • https://cdn.shopify.com/s/files/1/0457/7578/2054/files/calendrio_2019_com_feriados_sp.pdf
    • https://cdn.shopify.com/s/files/1/0435/3087/9125/files/all_star_smash_mouth_piano.pdf
    • https://cdn.shopify.com/s/files/1/0435/3707/2280/files/jorewejujagidiw.pdf
    • https://static.usrfiles.com/ugd/b5aed9_34f4d1d4c1034d33aad8da6059568ba2.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e917a9ebfc84f4cb7f12620469f7aeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed5e262a66c34816884a5691be4fe99d.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_off00004568.bin
cea968b156ce5b0523a5b51689b33d66c3caf6f5f0cd307e8338034cc89f5d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4568 5336 bytes
font_01_sfnt_off0000577a.bin
d711b8e56ff08b2b037917bedd420ef8cdf8ea033fa65fbe512c7be9165ebc24
pdf-font-stream PDF embedded font (sfnt) at offset 0x577A 10032 bytes