Malicious PDF — malware analysis report

Static analysis result for SHA-256 b832a57c9c1f3f5c…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 22:41:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c004b8bc01de167e71b86052879906ce SHA-1: 9b6633a631bb87ab803c15653f6984b8f55ad502 SHA-256: b832a57c9c1f3f5cff0b14cd5d9faa73ba273796ed918eeefd2e537c990c920c
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an 'Instant Pot manual'. This link, 'https://ttraff.cc/wb?keyword=instant%20pot%20manual%20high%20pressure', is designed to lead users to further malicious content. The document also functions as a link farm, embedding numerous external PDF links, many of which are hosted on Shopify. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

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/wb?keyword=instant%20pot%20manual%20high%20pressure
    • http://wozerev.glam2bella.com/uploads/1/3/1/4/131437252/tepamasajidizi-fukiro-sowifukozeti.pdf
    • http://files.actemm.com/uploads/1/3/1/4/131453436/zodulepikij.pdf
    • http://files.decatursistercities.com/uploads/1/3/1/4/131408204/wivenojawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8453/0343/files/cdisc_adam_implementation_guide_version_1._1.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/4235672026.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/lajukefixufidifokidojono.pdf
    • https://cdn.shopify.com/s/files/1/0438/2251/4338/files/b_l_theraja.pdf
    • https://cdn.shopify.com/s/files/1/0448/5398/5442/files/biometrical_techniques_in_plant_breeding.pdf
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/sikokodekimolumoruta.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/53715782376.pdf
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/african_continent_countries_and_capitals.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/vector_calculus_marsden_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/14032037623.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/varisia_birthplace_of_legends.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/63413435784.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_off000064e4.bin
908830897a6a1830f4a18610e23e17daf716cca56389f38db668bbaa807f0832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 5172 bytes
font_01_sfnt_off00007642.bin
74ff48ec5fc3819519ffd693539998ec5f31f29f3ab733433ea218ce939aa9b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 10460 bytes

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