Malicious PDF — malware analysis report

Static analysis result for SHA-256 5919220b250bc492…

MALICIOUS

PDF

37.6 KB Created: 2020-08-30 20:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: debcb80435d7206b64f0f78319a8766c SHA-1: ea80f7e43d2f2008a9031fc5dc352edf2a280d57 SHA-256: 5919220b250bc492437674a186d728741121cc80552893c7f3ec91ec33e9a0ed
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs. The document body, though heavily corrupted, contains the same malicious URL. The primary attack vector appears to be luring the user to click the malicious link, which is likely to lead to a phishing page or malware download.

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=kurtlar+vadisi+jenerik+m%25C3%25BCzi%25C4%259Fi+indir
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/35339183341.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0850/files/samog.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/xeriwosarosupedakuw.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/vojolobufatameva.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfa17985ca154f1aa7a4b9e967223679.pdf
    • https://static.usrfiles.com/ugd/b8c837_98e690e6f0534ebfbdd6ce7f5ef469b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec6dc4abfed24e0485d191fad560d80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2c4bba5127a4c2b93fd32c817457492.pdf
    • https://cdn.shopify.com/s/files/1/0436/6503/1321/files/robibebogaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/kagebalalepuvukiliz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000043a6.bin
e10948bd45314beeed6876daebf42158fc7c18f663cc7f2f306a8c61fa976191
pdf-font-stream PDF embedded font (sfnt) at offset 0x43A6 5312 bytes
font_01_sfnt_off00005576.bin
4a3204b5f254844185ac20e704445cfe20f2d9b21ac707a02d1b947b36d52611
pdf-font-stream PDF embedded font (sfnt) at offset 0x5576 11468 bytes
font_02_sfnt_off0000798a.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x798A 4324 bytes