Malicious PDF — malware analysis report

Static analysis result for SHA-256 a766a24268c1b7ff…

MALICIOUS

PDF

40.2 KB Created: 2020-08-24 02:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17b9d0c89bf7e660f7cc1ab1e2db29e7 SHA-1: b0fe9d1018e879ed7bd1b0e7f7bb912ec4008bb5 SHA-256: a766a24268c1b7ff7ddc4dbfd57c47eaa8a42d5fe160eb5c7210df4f7eb37d74
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to malicious sites via embedded links.

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.com/pify?keyword=casablanca+bridal+and+formals+hawaii
    • http://files.saratoganykennelclub.com/uploads/1/3/1/4/131455141/pamufo_funeg.pdf
    • http://jerafot.nakitahogans.com/uploads/1/3/0/8/130813612/3147578.pdf
    • http://files.drrjbattechiropractic.com/uploads/1/3/0/8/130873941/barigox.pdf
    • http://files.oregonbiomedicalassociation.org/uploads/1/3/2/7/132740892/144987.pdf
    • http://popixe.soilandsun.co.uk/uploads/1/3/2/3/132303320/6088485.pdf
    • https://cdn.shopify.com/s/files/1/0431/0050/4217/files/retirement_party_flyer.pdf
    • https://cdn.shopify.com/s/files/1/0465/0562/3710/files/4_hour_body_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3802/files/be_going_to_present_continuous_present_simple_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0439/7580/3038/files/wapavomubuxina.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/risk_assessment_in_software_project_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/1387/2548/files/lobivute.pdf
    • https://cdn.shopify.com/s/files/1/0430/6246/0577/files/46764654976.pdf
    • https://cdn.shopify.com/s/files/1/0434/6704/7077/files/farimenunuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9944/6693/files/gold_patent_high_platform_heels.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/pavonixigivupodebo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1781/3661/files/pekenekujutabu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6406/6209/files/35579892482.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_off00005ed7.bin
12344a6199f23089cc9288c6dac4946aa66705ca6bad531b8fa19954cee4b133		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED7 5400 bytes
font_01_sfnt_off0000710b.bin
4fa07236ba10fbd4dd1b10ddabe422a667eed63770729653767a4b6c5233ee8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710B 10168 bytes

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