Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac60f6ffdc634b1…

MALICIOUS

PDF

39.2 KB Created: 2020-08-19 19:40:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a52d2eabe220d278cb9a048575a5c82a SHA-1: 2fa3cc43d6aaa9cd63caaba88211da52acc9c1eb SHA-256: 8ac60f6ffdc634b100c70cd3c48007af0bc90402230a1b1868f1f6b9ef892c85
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=trasformazione+centimetri+cubi+in+litri'. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=trasformazione+centimetri+cubi+in+litri
    • http://files.lofos-apartments.com/uploads/1/3/1/4/131438036/42f8c9ee5.pdf
    • http://files.mosston.school.nz/uploads/1/3/1/3/131398174/811681ceaaa4507.pdf
    • http://files.reneeheissart.com/uploads/1/3/1/6/131637316/fudetipa_juzeku_gubemuxoni_vubazulirotiwod.pdf
    • https://cdn.shopify.com/s/files/1/0435/9444/9055/files/bilingualism_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/aide_memoire_economie.pdf
    • https://cdn.shopify.com/s/files/1/0441/2994/3704/files/79309947382.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/juvuwiveputililubodaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58863311498.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/mcps_2020_20_calendar.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/the_guardian_crossword_answers_today.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/neoquest_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/reraferalotodunofidisaxom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/55345792549.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/34509237411.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_off00005b7b.bin
51e9d16ec019554086520b83e33604e27b36875c45e8be1bd02ec5f192defa8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7B 5164 bytes
font_01_sfnt_off00006cfa.bin
ede3e8f5190a3b985b0d547641db58268d1648fdd1b873e1430b085dd68b6fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFA 10844 bytes

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