Malicious PDF — malware analysis report

Static analysis result for SHA-256 11768a1aa9fb9a37…

MALICIOUS

PDF

40.8 KB Created: 2020-08-26 14:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb361eb6fa311e5a9472d789e156b8e SHA-1: 0d3e79fba3b53b7bd284d491204cdab1a6a3afec SHA-256: 11768a1aa9fb9a37b1066d354e53479678cf822dcf97e13052b160613bfedf96
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=crime+scene+photos+gore', is directly linked to the lure text found within the document body. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely 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/pify?keyword=crime+scene+photos+gore
    • http://balidazo.elginartsassociation.com/uploads/1/3/2/6/132683403/4389388.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/safety_valve.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6051/files/sovekezesubokamof.pdf
    • https://cdn.shopify.com/s/files/1/0433/1945/9998/files/ethical_hacking_tutorial_point_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9189/files/exponent_rules_worksheet_algebra_2.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/98225467405.pdf
    • https://cdn.shopify.com/s/files/1/0434/5554/5497/files/8177483233.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/ziwem.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/51433298764.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0312/files/talaq_in_islam_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/suvadurefa.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_off00005e0d.bin
459e3a573ee7f6eadb56d55d615be91031ec6e62dca10ba44c8bb70fac957dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E0D 5012 bytes
font_01_sfnt_off00006eed.bin
f9e62d82e92eb5c4a59746fe958db6f54ea9865ee8740328739f968967a31ea3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EED 12652 bytes