Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e399b6ab1bf584…

MALICIOUS

PDF

36.8 KB Created: 2020-08-12 04:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2baf1b41df83c69f469d7b0fd0c7f3bc SHA-1: 29f4bc22f21859372d76f06e2fba41bef76ed382 SHA-256: 04e399b6ab1bf5849a4dce9cebf7ca4f31671b0c54a6ea573f779722a53fc85a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.cc'. Additionally, it features a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs are likely part of a campaign to redirect users to malicious sites or to manipulate search engine rankings.

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=bulats+speaking+pdf
    • http://files.fireadaptedbailey.org/uploads/1/3/1/8/131856543/6ddcabd3.pdf
    • http://files.saddleuphorseproducts.com/uploads/1/3/0/7/130738616/5422298.pdf
    • http://files.lespiritcrafts.com/uploads/1/3/2/6/132681576/bifujunodumep.pdf
    • http://files.ideamonterreypark.com/uploads/1/3/1/3/131380616/wiginapiluzebikukar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0441/2715/8424/files/physics_textbook_class_11_maharashtra_board.pdf
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/altimetria_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7549/files/rakifozarofapabuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/38311078703.pdf
    • https://cdn.shopify.com/s/files/1/0435/0921/9492/files/3241566073.pdf
    • https://cdn.shopify.com/s/files/1/0433/9741/5077/files/favanebesipubefonudofe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/vomunenapanafolufoxi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/13000258872.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/82438570915.pdf
    • https://cdn.shopify.com/s/files/1/0430/4194/7801/files/hernia_inguinal_incarcerada_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/6048/5541/files/49523514275.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/endometritis_in_cattle.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_off000052fd.bin
9de3e778936b6e9bd4a374470d0a00f6c31ef373e98eb9b95c61268fe4dbed5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52FD 5228 bytes
font_01_sfnt_off000064de.bin
476d7c69c5360caa87233048ba9157bb06e35f04245eedcc2e788add39fe983c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DE 9820 bytes

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