Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4092bd3aa50ae7…

MALICIOUS

PDF

45.0 KB Created: 2020-07-31 00:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a8e5a721c21962d3015ce752d733649 SHA-1: 072853379a13505f552df551b9303ca5ce2213d6 SHA-256: ff4092bd3aa50ae733066d6f7acf6f41984664aa58b7a8ed38d9bdac49c67869
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users through deceptive links within the document.

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=algebraic+expressions+and+equations+pdf
    • http://files.danredner.com/uploads/1/3/0/7/130776728/9434134.pdf
    • http://files.beerandwinefiltration.com/uploads/1/3/1/6/131636927/bejerovakezazajan.pdf
    • http://files.genevamindfulness.com/uploads/1/3/2/7/132710697/nireforoxazeveruximi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/15453774503.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/75602651058.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/jikumevexazese.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/vekipolanajarotogedomufub.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/soxanekaseterotaneke.pdf
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/16178795340.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/1072579971.pdf
    • https://cdn.shopify.com/s/files/1/0427/3415/7991/files/kibugipewapivis.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/50513456872.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/kovorujotujiniboruvag.pdf
    • https://cdn.shopify.com/s/files/1/0429/8457/1031/files/xuxokebisezu.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/1/0428/3046/3142/files/vekipo

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef5.bin
184c716cc7c71809a26790a49e1e709804531893e1b26d865dabc24a979de0a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF5 5528 bytes
font_01_sfnt_off000081c1.bin
14d6ea455bc5c5da22419acb8f9c76098424a65c0992017bd97c650284fc2873
pdf-font-stream PDF embedded font (sfnt) at offset 0x81C1 10920 bytes