Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d29d24c190b8ce…

MALICIOUS

PDF

39.9 KB Created: 2020-08-21 11:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba7648154f95cd0690706a92438153dd SHA-1: d952711f655ee6425324d2fc8b824b4c2720560b SHA-256: 92d29d24c190b8cee5f375ba3819563a08e3b432338186ea56a76adb4d97e609
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body text and the malicious redirector URL both mention 'android automation test', indicating a lure to download potentially malicious software. 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.cc/pify?keyword=android+automation+test
    • http://fokesuka.mindfulsoulcenter.com/uploads/1/3/0/7/130776133/2946682.pdf
    • http://files.mtabenefitfund.org/uploads/1/3/1/3/131398129/vofewivevukupuz_toxepozener_rivefukujapul.pdf
    • https://cdn.shopify.com/s/files/1/0438/6612/8549/files/tricky_bike_stunt_game_2018_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0438/2552/8989/files/rexusuwopawotalusoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/8279/2612/files/leonard_cohen_hallelujah_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/rupesoxiniwevapituk.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/durimixelus.pdf
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/ryobi_4_cycle_trimmer_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/3767/7989/files/flat_sheet_carbon_fiber.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/63983168457.pdf
    • https://cdn.shopify.com/s/files/1/0434/5308/7901/files/tebubejidokezut.pdf
    • https://cdn.shopify.com/s/files/1/0428/4973/0727/files/41094286419.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5237/files/10368921864.pdf
    • https://cdn.shopify.com/s/files/1/0437/0972/6888/files/19494763612.pdf
    • https://cdn.shopify.com/s/files/1/0434/8474/1798/files/zombie_catchers_apk_hilesiz.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_off00005f44.bin
745810aa834f259c9f02ce0078ce4e123df2edbf751c618080240fdfecc9a844		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 4928 bytes
font_01_sfnt_off00006fe6.bin
469747f795df15283fd91189b2ba940094defff90a4d509a834341450b4148be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE6 10300 bytes

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