Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba5624075d99c5a…

MALICIOUS

PDF

55.1 KB Created: 2020-08-05 00:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fb4f8a1a292437c4de2af40a3d4a6c9 SHA-1: 3065cc2e7dd27fb9078f59634a4c2469f44b07c7 SHA-256: 8ba5624075d99c5a534393540ecd932ce6dff0f845250daa046114260b31a26d
120 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, specifically pointing to 'https://ttraff.cc/pify?keyword=wrist+exercises+for+carpal+tunnel+pdf'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though malformed, contains text related to carpal tunnel exercises and the malicious URL, suggesting a lure to a malicious site disguised as a helpful document. No scripts were extracted from this sample.

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=wrist+exercises+for+carpal+tunnel+pdf
    • http://files.transformation-travel.com/uploads/1/3/0/7/130740211/mibenepelituw.pdf
    • http://files.jackinamerica.com/uploads/1/3/1/4/131407315/xufofuxe.pdf
    • http://files.trawallaps.vic.edu.au/uploads/1/3/1/0/131070762/xisatut_mavikevuzebup.pdf
    • http://files.roberttalksbusiness.com/uploads/1/3/0/9/130969300/17d774047.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/bolerilowiwaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/zekekebijepasafetagezimik.pdf
    • https://cdn.shopify.com/s/files/1/0429/5481/7690/files/joxilevavak.pdf
    • https://cdn.shopify.com/s/files/1/0432/6775/2100/files/zuguvep.pdf
    • https://cdn.shopify.com/s/files/1/0436/8800/1689/files/tulotufebemegom.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/19570351827.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/68916309873.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/pruebas_ser_bachiller_2020_resueltas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/legamixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/cummins_8._3_service_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e2.bin
00125735e98c8ba9c6b655c74730ee7360aae4c71b71bb691bc9b6fab6587195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71E2 5112 bytes
font_01_sfnt_off0000835f.bin
7f884ceaa5637bf45ef1da1c91eaad956cdb754033bb373d7807893fd9236eb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835F 10012 bytes
font_02_sfnt_off0000a5d7.bin
376a0f57cd5777ba115f4b62cd919ceded82b0ae3a6d9963216dbcf885295ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D7 18104 bytes
font_03_sfnt_off0000c120.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC120 4324 bytes

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