Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d692e8b76dd94fd…

MALICIOUS

PDF

33.2 KB Created: 2020-09-01 18:52:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c79409953766699d45bcc3f44031e746 SHA-1: 219f509a3b3d8f38b782bb2c18d0fca3d43232f8 SHA-256: 7d692e8b76dd94fd6906836af9b5d1ae0a8bcd562edcb607c3e3f79cea40fcc0
154 Risk Score

Malware Insights

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

The PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to malicious content. The document body itself is heavily obfuscated but contains the same redirector URL and a list of other PDF files hosted on Shopify, suggesting a link farm or content distribution network for further malicious payloads. The ML classifier 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.com/wix?keyword=orasatha+album+songs++starmusiq
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ce14f3_05905b6d57ab47e4b0b25f383417e727.pdf
    • https://static.usrfiles.com/ugd/b8c837_84a0b93aa568496e8e1fa3454ffecf22.pdf
    • https://static.usrfiles.com/ugd/0c41e7_54c40acca8be46a88183ae14a66f2a7f.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/filanivov.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/cd_siz_format_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/83095974355.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/78178297398.pdf
    • https://cdn.shopify.com/s/files/1/0448/4582/6210/files/principles_of_auditing_18th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8770/files/kunupunokukonesa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/vovukipaleviremasuwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7096/files/arunagirinathar_songs_free.pdf
    • https://static.usrfiles.com/ugd/d9e9a0_f78d421b3b1c4a55b1ef499d1a57c675.pdf
    • https://static.usrfiles.com/ugd/2e16aa_9b358ee060bb4f898669f63d02fc9d90.pdf
    • https://static.usrfiles.com/ugd/b8c837_755704f540af4d7bb0e46674b279632e.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_off0000452f.bin
1acfd8e0fb647e058f70b6d49b802713a6d48cd9c76b71f0dea7742c198ec5c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x452F 5392 bytes
font_01_sfnt_off00005751.bin
535bd1bdf1b897166b9cd91a1f11c1d1add6474951c2778d7eeec201a52c694a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5751 9628 bytes