Malicious PDF — malware analysis report

Static analysis result for SHA-256 242196848a4d3ea9…

MALICIOUS

PDF

36.9 KB Created: 2020-08-29 22:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c346da62a659322f2859dab37cbf148e SHA-1: 0c7edbef80b9b763846482b1041de92df733b15e SHA-256: 242196848a4d3ea9babcd23f15f8cdedad2508ac600a988b679e9502d0a329cc
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented within the document body, disguised as a song download. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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.com/wix?keyword=kuch+toh+hai+tujhse+raabta+song+down
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/chaita_ki_chaitwal_dance_video.pdf
    • https://cdn.shopify.com/s/files/1/0450/8496/7077/files/compound_inequalities_graphing_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7017/6932/files/idylis_air_conditioner.pdf
    • https://cdn.shopify.com/s/files/1/0437/4924/5079/files/57446974843.pdf
    • https://cdn.shopify.com/s/files/1/0440/0021/5190/files/24022967618.pdf
    • https://cdn.shopify.com/s/files/1/0430/3339/5351/files/inventory_aging_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/cabinet_minister_of_odisha.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/negolebopine.pdf
    • https://cdn.shopify.com/s/files/1/0440/1122/5246/files/bsc_physics_syllabus_sambalpur_university.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/36452076221.pdf
    • https://static.usrfiles.com/ugd/b8c837_a90dd225c32e41e8af431106ff17fda3.pdf
    • https://static.usrfiles.com/ugd/91e123_ce5d00f1e063492caded6921e1021678.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_off00004cda.bin
27760521a525878840069e534e00be920ac5ce6b4084cbedd35439dc5aea46d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDA 5448 bytes
font_01_sfnt_off00005f66.bin
470dc62a84308b3bf9c6e47a5baec004c61af9873b35230e5ab20228c9d2f57a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 12160 bytes

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