Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf53b350cb62af0…

MALICIOUS

PDF

44.1 KB Created: 2020-08-30 09:42:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6fdeac7e6c848b241f96b7c2546987e SHA-1: 1fca7be992d2cf7be9a2c8a359f6eb28f9af72e7 SHA-256: baf53b350cb62af0c46850276c26a5ee53d5b0a6e095f64482da63ba26c6d825
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources, classifying it as a link farm. One prominent URL, 'https://ttraff.ru/wix?keyword=tibia+druid+leveling+guide', is flagged as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to lure users to potentially harmful sites, possibly for phishing or malware distribution.

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=tibia+druid+leveling+guide
    • https://cdn.shopify.com/s/files/1/0434/8575/7606/files/learn_english_speaking_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/reading_skills_definition_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/zodusu.pdf
    • https://static.usrfiles.com/ugd/34e21e_79d5c6cef32848f2b16cc7701f1def25.pdf
    • https://static.usrfiles.com/ugd/f80014_e75218ecfa3a44509161db951c23b11a.pdf
    • https://static.usrfiles.com/ugd/b8c837_abe6bba0a8304adcb885ee555a61a8ab.pdf
    • https://static.usrfiles.com/ugd/1be480_6681d6361bf842a9a335d60fb9a49f0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_892d3fbbb69d41a09f1340ce68271130.pdf
    • https://static.usrfiles.com/ugd/0dd040_314277b58fa649cbb7ef65a74b2e8a96.pdf
    • https://cdn.shopify.com/s/files/1/0440/2397/2005/files/relutixopikogilobadal.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/66846667327.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7616/files/42662201202.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_off00006fe4.bin
8e6212226a3a0eb9a7326ffa0596f82b576215b91033a357d155e6188aeae616
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE4 4964 bytes
font_01_sfnt_off000080d8.bin
64ddfc71dc35afb5cf45bf77585c2f7ece8f9cbb19d348f65f405faa7a1f657c
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D8 10308 bytes