Malicious PDF — malware analysis report

Static analysis result for SHA-256 b17d831bab4d2ba3…

MALICIOUS

PDF

34.7 KB Created: 2020-08-30 06:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d743b318c2ea2965fb83b54d141b3103 SHA-1: d6227d8ace86ebd56fa87864287c0b6175a9fbb8 SHA-256: b17d831bab4d2ba39e7da07bcb3ff2ed993b174a2956c307d2be63edd84a0f0d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to distribute further malware. The document body, though heavily obfuscated, contains references to a book title and URLs, suggesting a lure to a malicious site. The presence of multiple embedded PDF links, many pointing to Shopify, indicates a link farm strategy to improve search engine ranking and visibility for malicious content.

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.ru/wix?keyword=mecanica+de+materiales+hibbeler+9+edicion
    • https://cdn.shopify.com/s/files/1/0465/4891/0238/files/mandated_reporter_form_nys.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/telugu_bajana_video_songs_come.pdf
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/49374879812.pdf
    • https://static.usrfiles.com/ugd/b8c837_28e3e3daad48408fa536b1a636621400.pdf
    • https://static.usrfiles.com/ugd/5af86b_84b4cce0ceb34ef69666a34c8e749c84.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c49ae8bb8cf417098de275d46bf0fe6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a628e339697e410585c0b7a4bc65a5c4.pdf
    • https://static.usrfiles.com/ugd/756799_33c3886c932a4d38b5ac0bc62bf0b9fd.pdf
    • https://static.usrfiles.com/ugd/6116da_fc2f519ffe9c439690d454e938a8ee0f.pdf
    • https://static.usrfiles.com/ugd/5b5da7_8afda67bc0b64935a9b044e3eb6a57da.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004637.bin
c483954ba26bac20e7e5a453c07990c6548a341e08f1c79f503f713c0a48b289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4637 5480 bytes
font_01_sfnt_off0000589f.bin
8fca1210a59de4f0cbbcca7dc78c6024467423352f7e80b02cccb1578fd6fe9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589F 11028 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.