Malicious PDF — malware analysis report

Static analysis result for SHA-256 7344cc322b4a6c39…

MALICIOUS

PDF

47.5 KB Created: 2020-08-14 02:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd70bc89ad94c2a3158cc11e314aeb9a SHA-1: 6ae0bf769f88897ac53cd2be1769cdf3ebc9f754 SHA-256: 7344cc322b4a6c39fba2ab32a00eab6a6760b7696e3dc41ac38f43df08cfff3a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, identified as a link farm, with a critical heuristic firing for redirector infrastructure. One prominent link directs to 'https://ttraff.com/wb?keyword=cat%20eye%20strada%20wireless%20manual', which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to URLs and appears to be part of a lure, likely for SEO manipulation or to distribute further payloads.

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/wb?keyword=cat%20eye%20strada%20wireless%20manual
    • http://files.sophiacobbs.com/uploads/1/3/1/4/131452953/780f0666fee8.pdf
    • http://tadomo.backstageatthebeach.com/uploads/1/3/1/4/131437130/guxogofajepivizejeni.pdf
    • http://files.plate-deals.com/uploads/1/3/1/4/131406036/kojofoma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/7221/6483/files/moviebox_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99913566500.pdf
    • https://cdn.shopify.com/s/files/1/0431/4172/6370/files/13701837827.pdf
    • https://cdn.shopify.com/s/files/1/0428/6454/1852/files/56063542666.pdf
    • https://cdn.shopify.com/s/files/1/0435/4785/2959/files/87486074672.pdf
    • https://cdn.shopify.com/s/files/1/0440/3757/0710/files/wedudokipokazesazaxat.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/savetijatubizuperidevi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/juwepakuwogeredaxato.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/78476923655.pdf
    • https://cdn.shopify.com/s/files/1/0430/4578/1665/files/jodapomozamovozurinabune.pdf
    • https://cdn.shopify.com/s/files/1/0435/4713/2068/files/autocad_plan_section_elevation.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_off00006f1b.bin
36b80471b1ffba071f148cfdbf56bce22065a9560923bbec3ead5e6b73f51014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1B 4960 bytes
font_01_sfnt_off00007fee.bin
93b5bcec69542584a29b6946f56fcef2719cc0410dc6e4c207765b0aaa21c811		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEE 10156 bytes
font_02_sfnt_off0000a286.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA286 4324 bytes

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