Malicious PDF — malware analysis report

Static analysis result for SHA-256 625b9acba572da55…

MALICIOUS

PDF

41.3 KB Created: 2020-08-08 18:32:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6cc189044e63383d42719775f30e0bc SHA-1: 468237b1e68a28d4a5a230c2a9f0ab3c2115a148 SHA-256: 625b9acba572da55f86248dda81f31c900d5892d41954d5d63bb908205c0b166
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to what appears to be a link farm designed to host SEO-optimized PDF documents. One of these links, https://ttraff.ru/pify?keyword=physical+and+chemical+properties+of+alkanes+alkenes+and+alkynes+pdf, is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL and other URLs that are part of the link farm.

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=physical+and+chemical+properties+of+alkanes+alkenes+and+alkynes+pdf
    • http://xoninox.lifeisthestoriesyoucantell.com/uploads/1/3/1/8/131871390/kenuruxawalim-dufenanivad-fefilep.pdf
    • http://xononi.comicstripmatinee.org/uploads/1/3/2/8/132815002/tomotubata.pdf
    • http://files.isamurats.co.uk/uploads/1/3/2/6/132680986/pebaja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/how_to_manage_a_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luzugojozawok.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/40777232412.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6813/files/gobazifokagulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/tisoberu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/12919581452.pdf
    • https://cdn.shopify.com/s/files/1/0428/5651/3692/files/venture_company_mining_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0435/7115/1007/files/power_amplifier_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/12840759351.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/dowry_prohibition_amendment_act_1984.pdf
    • https://cdn.shopify.com/s/files/1/0432/3413/2131/files/portuguese_to_english.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_off000062bb.bin
5bb8c85f10a71870efc02e89f00a467b154fe71b48f40cdd97e96507a13c30d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5564 bytes
font_01_sfnt_off00007585.bin
1a3ee67230c24e9f224ea8281e6a5a434e78cffa04c7534395d67560589c23ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7585 10076 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.