Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2a72c3d3019f64…

MALICIOUS

PDF

46.9 KB Created: 2020-08-09 18:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e30da253e23efa706af028d03f1714b SHA-1: 538ef90ef2924acc8899096ad9aec65950948334 SHA-256: 0c2a72c3d3019f64aafa393dc65c0bb9dbadcb6148f16f8842374264c2ea8f35
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL, indicating its likely purpose is to redirect users to malicious content.

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=around+the+world+in+80+days+questions+and+answers+pdf
    • http://narusu.elliskerleyfoundation.org/uploads/1/3/1/3/131383664/defed774ff12d34.pdf
    • http://files.emeraldcoastchapter.org/uploads/1/3/1/6/131607103/3228502.pdf
    • http://bibebabop.dawnmoniquewilliams.com/uploads/1/3/1/4/131437363/5b923.pdf
    • http://files.thegardenchild.com/uploads/1/3/1/6/131607075/cf4a346e18b.pdf
    • http://gupep.itchyfeetphotography.net/uploads/1/3/1/4/131453540/ed7a03302.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2524/4053/files/99343627779.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedapefe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/pipulipovokox.pdf
    • https://cdn.shopify.com/s/files/1/0428/4514/3207/files/jugomowosebimelar.pdf
    • https://cdn.shopify.com/s/files/1/0438/2877/3021/files/71785844482.pdf
    • https://cdn.shopify.com/s/files/1/0431/8514/3969/files/4980190055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6806/files/13696564845.pdf
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/dobirifizowum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.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_off0000777e.bin
ab9a2eaaf9f0b0a810372e139cf590a148d011f725b84c1b98f20f9148e2a84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x777E 5772 bytes
font_01_sfnt_off00008b39.bin
dbef69443fa0ebb879823615ac9054b66ea7b53f65813fa487a572debe074c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B39 10264 bytes