Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f6139699f934e0…

MALICIOUS

PDF

40.9 KB Created: 2020-08-20 14:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb412898bff1d3fc466f8a20f11de473 SHA-1: 6a44add2e4f48b67167d7323832127f95ec20233 SHA-256: 03f6139699f934e0e5aae24678e2bdce8083d74f592d347637c700c5f07fbd2e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=kanda+bongo+man+songs+free'. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to malicious infrastructure.

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=kanda+bongo+man+songs+free
    • http://depema.wisdomofgrief.com/uploads/1/3/2/6/132683097/wabunefenaturasafo.pdf
    • http://mumalo.assiniboiaartscouncil.ca/uploads/1/3/1/0/131069839/gapaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/41656582850.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifezunelavezide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5814/files/detakovenosutejuf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/45174671834.pdf
    • https://cdn.shopify.com/s/files/1/0436/4448/5790/files/caballo_de_troya_5.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/kasuleses.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6833/files/85086714603.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/samsung_ssd_magician.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4008/files/banking_service_chronicle_august_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/8918/0310/files/loxojenuxabezuzisuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/39687018380.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/the_creature_from_jekyll_island_griffin.pdf
    • https://cdn.shopify.com/s/files/1/0430/2009/1555/files/33097390081.pdf
    • https://cdn.shopify.com/s/files/1/0431/7891/8048/files/pilokamomazututin.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005265.bin
c766431d4d3887b8032febb192f36a09f5cf92beb9b590e01efbc4ff12cb73ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5265 5304 bytes
font_01_sfnt_off00006456.bin
d093c8fa56d8d5e0404ed99189288bb367addd581efc66cf1bcd2e0c375080e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6456 15504 bytes

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