Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7ed4e08b49191b…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 06:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69a1317a6883cc2e61e6d1ee2c4687ba SHA-1: 5a4b82d7baee15c75518c3f1718158a1da7b67f7 SHA-256: 6c7ed4e08b49191bd7ef12c06739084da0f14a584cc200f037bf5a9eb48d4b8f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead users to malicious content. The PDF also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, suggesting a tactic to manipulate search engine results or distribute further malicious content. The ML classifier strongly flagged this PDF as malicious.

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=taboo+magazine+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/denobaxitezilisason.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/55619254797.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/retugibulorujesa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/87188505910.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/95449884015.pdf
    • https://cdn.shopify.com/s/files/1/0431/0129/0650/files/efkat_tepe_mp4_indir.pdf
    • https://static.usrfiles.com/ugd/b8c837_14d8d984de324ca39cffe21bbbbdfa34.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce9bef7a5b524514a2015b534cdf4826.pdf
    • https://static.usrfiles.com/ugd/b8c837_afbed4158d894d2b9c736ce5648a1a09.pdf
    • https://static.usrfiles.com/ugd/20d83a_7835991c59b94a4a98f98dcc89cd7ab1.pdf
    • https://static.usrfiles.com/ugd/33ab24_a316d7bc05e843d18c8ba5b1ff179ff5.pdf
    • https://static.usrfiles.com/ugd/c1de29_98e54a7fe241497abfb91b55870b7b91.pdf
    • https://static.usrfiles.com/ugd/9c43ec_2f58efea10e24c64bbc569292b6c951e.pdf
    • https://static.usrfiles.com/ugd/b85eb0_0ac46ecae4dd4ec880a8939b2ae500f1.pdf
    • https://static.usrfiles.com/ugd/97aff7_1f6a2a24054145508a7713580fd1cccf.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_off00005782.bin
7475d8abc17ef3ed5b56bc83fdbcade4389141b7bc4354d4944855320cb4547c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5782 5196 bytes
font_01_sfnt_off00006923.bin
bdf4a07e4ff05cc838ea68ffc72df287cfff07bdb53c34211488a1bd1f9eff8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6923 10528 bytes