Malicious PDF — malware analysis report

Static analysis result for SHA-256 2586f6c702c9f401…

MALICIOUS

PDF

66.9 KB Created: 2020-08-05 01:25:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b61976e2358011c458494164239114 SHA-1: 51ba9e323cfc0dd455cced8c71cd4a513a5cbedf SHA-256: 2586f6c702c9f40145cbf65f0f62b2bf4bf3ff67683407164adc46eb2aedfe3e
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL that is likely used as a lure. The primary attack pattern involves redirecting users to malicious sites through a link farm.

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.cc/pify?keyword=paradise+lost+book+4+line+by+line+translation+pdf
    • http://files.laurenclarkedesign.com/uploads/1/3/0/7/130738841/muzovivabawa-sanavuzefijuxi-zovobew-mujomupozirited.pdf
    • http://files.stpaulslewisburg.org/uploads/1/3/2/3/132302710/sorupusadudezumu.pdf
    • http://files.amandawroten.com/uploads/1/3/0/7/130738806/04bf8d9004626f.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/50301010305.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/joriwapowovelizobuxufode.pdf
    • https://cdn.shopify.com/s/files/1/0439/3140/2395/files/rarivanoxezat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9305/6933/files/zibibegifaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0201/1548/files/96058698478.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34530012154.pdf
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/99850948857.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/42539854631.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/palezuvapemolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1552/0935/files/71939890161.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/44000668860.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/notebedatinekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4405/2898/files/72625066596.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_off0000c8df.bin
eacf513ff0110dfd05fbd2d00cf338402875abf4199cbaa0ca526c82e205ff39
pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DF 5428 bytes
font_01_sfnt_off0000db6e.bin
c78c77eda84f0b17191882272f3456c80b4d10bbdb8e53d92aa232b62644afb4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6E 10124 bytes