Malicious PDF — malware analysis report

Static analysis result for SHA-256 636370485c01f62e…

MALICIOUS

PDF

57.2 KB Created: 2020-08-29 18:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 092738be514e4a910595931e5acdd3e4 SHA-1: 324217532a3b792058830cc9baa136422116abf0 SHA-256: 636370485c01f62e45c03acccd8e5bb68dbf64d43d55ed8d66b8b36a3396316d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious sites. The document also exhibits characteristics of a link farm, with numerous links to external PDFs, suggesting an attempt to manipulate search engine results or distribute malware. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs strongly indicate a malicious intent to redirect the user.

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/wix?keyword=patricia+highsmith+short+stories
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54729765263.pdf
    • https://cdn.shopify.com/s/files/1/0458/2752/2723/files/18332730119.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/suzabenon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://static.usrfiles.com/ugd/b8c837_8c683f470e8d4d2c9afb00afbd6570fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_35695968fed741b7abf77f63de221c93.pdf
    • https://static.usrfiles.com/ugd/d2751c_bd3f3b4f31aa421ca05eb48dd8406745.pdf
    • https://static.usrfiles.com/ugd/b8c837_664249c81da44ab2969ba9e06293e833.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8ade5e9a72a46d2a013f43be6f77b37.pdf
    • https://static.usrfiles.com/ugd/b8c837_a90dd225c32e41e8af431106ff17fda3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed65bc8767a9478181d30ce0d073edcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d131643174e403598696e0872934691.pdf
    • https://cdn.shopify.com/s/files/1/0429/1523/3959/files/kankakee_river_walleye.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/tamil_movies_telugu_2019.pdf
    • https://cdn.shopify.com/s/files/1/0438/0629/4176/files/38951311323.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_off0000a29d.bin
8927b23f056c7757b6eb4e1d86d08e96de14a2a04bdc6e081e39ffd7f2b53d8a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA29D 5180 bytes
font_01_sfnt_off0000b414.bin
17fca48b75710fb8dec0595ab95120e95f1b8a466fe57973b0accf9ec5399c8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xB414 10476 bytes