Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f2e85b8f3f5a0d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-08 12:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 239f5c38dedb65d9e1309b13c2fb4570 SHA-1: 71d7dc73b6bee7c2566ef5f02529d1dd58994638 SHA-256: 06f2e85b8f3f5a0d973757b4b60d2b6c603d3ed2ccd9ebebe7dafd555e95ef06
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on Shopify. The presence of a 'download button' lure further supports a malicious intent to redirect users. Although no scripts were extracted, the embedded URLs and the nature of the heuristics strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=%25C4%2591%25E1%25BB%2595i+file+pdf+sang+excel
    • http://fifev.protecmotorsports.com/uploads/1/3/2/6/132681504/1733304.pdf
    • http://bonofalas.gcctraining.net/uploads/1/3/1/3/131383483/3412988.pdf
    • http://files.ridgefieldanimalhospital.com/uploads/1/3/1/3/131379591/nezivuvane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7899/1518/files/wamupuzuxezufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/visezegumine.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/59687403155.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/80796045620.pdf
    • https://cdn.shopify.com/s/files/1/0437/5163/7141/files/biruxipugenegunideboru.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/zifolunubotisoloj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6296/files/97553318994.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/student_attendance_system_using_qr_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5558/files/15191215236.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/xegefokinolijogenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7778/0134/files/beckett_baseball_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/auditing_assurance_services_a_systematic_approach_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4336/files/mm_to_micron_conversion_chart.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_off00006135.bin
4ed05636e6e66dc3ccadde24a8bcaaa41c84ac9428be3f7d1db387914c099a0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 5512 bytes
font_01_sfnt_off000073e4.bin
0950f470e468a8e8d44ca735d5dedf96ab171b9bbfefe12fc26f162f80040bd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73E4 10204 bytes

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