Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e4e34b5c4b1763…

MALICIOUS

PDF

42.9 KB Created: 2020-08-22 00:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb59fad545f266a393ec66a30c073195 SHA-1: 621a7161d85ef664654cdc28388e1af31088e220 SHA-256: d4e4e34b5c4b1763cd1580957c9f0ef2d2bec6ab7f77a26922d14b884b36d238
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to the malicious 'ttraff.com' URL, 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.com/pify?keyword=german+imperative+form+kommen
    • http://powijalaj.streathamsociety.org.uk/uploads/1/3/0/8/130814328/648407.pdf
    • https://cdn.shopify.com/s/files/1/0437/4478/8634/files/23126397308.pdf
    • https://cdn.shopify.com/s/files/1/0431/0132/3420/files/libro_verde_del_ganoderma_lucidum.pdf
    • https://cdn.shopify.com/s/files/1/0431/9644/8917/files/76674218184.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/56769806892.pdf
    • https://cdn.shopify.com/s/files/1/0434/3745/7574/files/zowopisagava.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/96188182377.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/40563848860.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/multiple_choice_questions_about_sound_waves_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/4927/1975/files/blank_answer_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7616/5536/files/gukedubosozosu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6204/8421/files/sql_join_query.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/ravisakapumozuxabesirakuz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9465/3594/files/97_infinity_i30.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_off00006b70.bin
9a373a35e229e4bb38bf88f8886e91bc687ee224ac09a5a9384b5d2e391436b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 4992 bytes
font_01_sfnt_off00007c63.bin
cbaa5d868162a48feb4e086867c1e6088f6a6d3e60af25e25be97afddbecbc9b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C63 10288 bytes