Malicious PDF — malware analysis report

Static analysis result for SHA-256 c02d1d91ca6d0ce4…

MALICIOUS

PDF

47.9 KB Created: 2020-08-17 06:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24107719e8865c81b29b8012170b21b6 SHA-1: 351ae944a9234c98d9b7e39dcb04e0d7a53b93e6 SHA-256: c02d1d91ca6d0ce4a7ca6bfafdc0194924c9b97d2b635111063ed1830f563109
154 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 links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same redirector URL. The primary attack pattern involves luring users to malicious infrastructure via deceptive links.

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=single+bed+sheet+size+uk
    • http://files.aroundthepros.com/uploads/1/3/0/8/130814769/guzujofawutef.pdf
    • http://files.sarahmdenn.com/uploads/1/3/1/8/131856333/wiwutixepojofo-fewukunok-marigejigusute-vuvip.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/placental_abruption_acog.pdf
    • https://cdn.shopify.com/s/files/1/0438/3339/3309/files/examples_of_hasty_generalization.pdf
    • https://cdn.shopify.com/s/files/1/0437/5012/9813/files/47508065413.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/algebra_2_quadratic_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5882/2296/files/58376378246.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/xosojewuwuwagojis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/briggs_and_stratton_31c707_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/xukilixuxube.pdf
    • https://cdn.shopify.com/s/files/1/0432/1620/8036/files/pugetuxupewasididivaviv.pdf
    • https://cdn.shopify.com/s/files/1/0429/4498/7292/files/hyde_park_ma_zip_code.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/ruvulomagusozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8148/9813/files/gastroenteritis_viral_fisiopatologia.pdf
    • https://cdn.shopify.com/s/files/1/0440/9029/4437/files/rufafubisozaxonedet.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_off00007da2.bin
cc6f9e0a8b6964f3c11886e913b5c4c582d2eeb13d6059635de2f7f0dfe9f022
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA2 5140 bytes
font_01_sfnt_off00008f1a.bin
e34462b718d576ca446b7fe63b327db94c0cd64b64f6dccae80916c29de74c63
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1A 10420 bytes