Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d0dc1aefab60c4…

MALICIOUS

PDF

37.2 KB Created: 2020-08-31 02:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a71b5bab5cb470c0c687417b752f535 SHA-1: a7e7f57e90d1f98e9866d22f72233d35509cae57 SHA-256: 07d0dc1aefab60c4dfcac0f77a6670734ca00768d8f6ee1227bc979f6352695c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a software price. The document also hosts a large number of external PDF links, many of which point to benign Shopify URLs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=zsimpwin+software+price
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5294/7863/files/50928817094.pdf
    • https://cdn.shopify.com/s/files/1/0435/3772/7637/files/6252323118.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/8th_grade_math_worksheets_with_answers.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb8f0d6663694b40a20dccc2731d356b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddc6350cfacd4fc08bc876b368e240d2.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c11272175974cbb830bac88bda7f0e5.pdf
    • https://static.usrfiles.com/ugd/1decf9_3c18d989ae994b31bebb0450930a2df0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce6250a253c848d9bf17ad1eedaefbd7.pdf
    • https://cdn.shopify.com/s/files/1/0431/4316/8156/files/pedisinivolonejulegufe.pdf
    • https://cdn.shopify.com/s/files/1/0439/8238/9406/files/8199433385.pdf
    • https://cdn.shopify.com/s/files/1/0433/4429/8133/files/xogowezemogepi.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bcfe55b00fe4b1f9322d46e4c6d493d.pdf
    • https://static.usrfiles.com/ugd/4826f5_b32e7724936545eca6bdcd119f278b63.pdf
    • https://static.usrfiles.com/ugd/b8c837_667933dfe85642a585d3573aa8fc227a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_3ca4e404727c47bfa719d189414e907b.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_off000052a2.bin
06262c2a7bd8711a2efe91fab210cfbaa6dd038cd6595b77d69400bcd7ff8e82
pdf-font-stream PDF embedded font (sfnt) at offset 0x52A2 5180 bytes
font_01_sfnt_off00006431.bin
6b121c8bda5843bad927c4979eda81214a8227ff75a7cd15ea77b0b418eca978
pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 10504 bytes