Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7594ae64550b60b…

MALICIOUS

PDF

40.2 KB Created: 2020-08-28 03:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ea1fcdc22901d2701545cb48e2294a SHA-1: c70f484302551a0e38d1eceaade5ab11e0956e57 SHA-256: b7594ae64550b60bf62a120f72ffd81caddd7535eb2db3fcbf69a608b12aa2f7
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.com/pify?keyword=hp+proone+400+g2', is designed to redirect users to malicious infrastructure. The document also contains a PDF link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO poisoning or to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=hp+proone+400+g2
    • http://kixiba.geoffsholler.com/uploads/1/3/2/6/132683328/kikino-ledomewegoseba.pdf
    • https://cdn.shopify.com/s/files/1/0429/4351/2732/files/97248581454.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/41300085494.pdf
    • https://cdn.shopify.com/s/files/1/0438/4836/8288/files/10884578928.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/10548153525.pdf
    • https://cdn.shopify.com/s/files/1/0429/1385/7692/files/9507854250.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/what_is_cognitive_behavioural_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0443/2547/0364/files/fabriquer_une_bobine_electrique.pdf
    • https://cdn.shopify.com/s/files/1/0429/8070/4405/files/junumefusiwanalulijuna.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/alegreya_sans_sc_light.pdf
    • https://cdn.shopify.com/s/files/1/0431/3366/5441/files/adobe_reader_for_pc_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3475/files/pajukatixetukewowasaba.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/winnebago_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6187/8687/files/51756492275.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_off0000530b.bin
002bbd479f364e552f32d22500116c54eb39c58ca6b680a0eea1ba0a9fdf1be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x530B 4892 bytes
font_01_sfnt_off000063cd.bin
1365f2a700e3f64643c3f991fa01e525cfc0739e327f04a4530dc18e8a8348d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CD 15024 bytes

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