Malicious PDF — malware analysis report

Static analysis result for SHA-256 10fcf172fb57fab3…

MALICIOUS

PDF

46.3 KB Created: 2020-08-25 09:29:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b988704a4d54fb2da0870e4049e56c14 SHA-1: a59b4d80394dae29724d2888fe8710e151752436 SHA-256: 10fcf172fb57fab34ff8b5ae59d8b610dfde2d5a485b7d31eb0c3a5517426795
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body also contains a large number of links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning attempt to drive traffic to the redirector. The ML classifier also strongly indicated maliciousness.

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=car+games+ing+com
    • http://dezulib.molly-boone-wed.com/uploads/1/3/2/7/132710714/2904707.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/67654502396.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/42517429558.pdf
    • https://cdn.shopify.com/s/files/1/0432/4373/3154/files/argent_crusade_rep.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5388/files/free_intro_templates_without_text.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/zowut.pdf
    • https://cdn.shopify.com/s/files/1/0429/2201/6934/files/26077310971.pdf
    • https://cdn.shopify.com/s/files/1/0437/0792/4635/files/21224129932.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/domamusuvusuzexi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e55.bin
3221acd5abef72bc1df927a5aa038a08acd87689184b127e3f9effb13b09db43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E55 4992 bytes
font_01_sfnt_off00007f33.bin
5d59e80714f055d0e20d1c4ed594903f00ea25dd365ddc0e243c90ca16be52db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 2024 bytes
font_02_sfnt_off000088cb.bin
904d5cf09af91f70c1207fc0a315baa1c3faa642191cdea7df4c0434aa99ff53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88CB 10452 bytes

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