Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c8d104e4530a28d…

MALICIOUS

PDF

45.7 KB Created: 2020-08-19 09:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 347fdc18702011d786792ffe4c35713a SHA-1: 23e482058411e505db133fb861ee69f7340aafda SHA-256: 1c8d104e4530a28d717dc1bf5996a204b9dfdf95fa35ea0d3f6b0878fd01485b
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to ttraff.com, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'free excel gantt chart template uk' and the malicious URL, reinforcing the lure. No scripts were extracted, limiting the analysis of further payload execution.

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=free+excel+gantt+chart+template++uk
    • http://nutomo.stdavidsdayschool.org/uploads/1/3/0/8/130813747/sixudutaxoju.pdf
    • http://files.hchicb.com/uploads/1/3/2/7/132740997/79ae2e2fb3777cf.pdf
    • http://files.habitatlacrosse.org/uploads/1/3/1/6/131606035/lazukeras-retosebofofun-piwufopod-jemikuzol.pdf
    • http://files.mattparrottphilosophy.com/uploads/1/3/2/8/132814375/mazadebeten.pdf
    • http://files.anaprojectprep.org/uploads/1/3/0/7/130775510/zikuveduzikepi.pdf
    • https://cdn.shopify.com/s/files/1/0430/1006/4537/files/mechanical_comprehension_asvab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/ontario_commercial_vehicle_safety_inspection_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0440/0853/8262/files/67770676379.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/pisibokerigarawiri.pdf
    • https://cdn.shopify.com/s/files/1/0429/3738/5123/files/13802227692.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/country_code_64.pdf
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/58337847834.pdf
    • https://cdn.shopify.com/s/files/1/0431/3477/9553/files/bertolt_brecht_mother_courage.pdf
    • https://cdn.shopify.com/s/files/1/0437/4649/2565/files/87754967936.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6982/files/insubordination_write_up.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000689b.bin
b166228fc0a1331113c6768c904e9677fcf667431ab77de7a20de19539fabfd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689B 5256 bytes
font_01_sfnt_off00007a4c.bin
a4f9df87690700faee88d503bf67bc8e10a7fe966558e659cc57d9e91b5d0e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4C 2188 bytes
font_02_sfnt_off00008455.bin
57560168a1d4d6285821fa22e4f15b48037cfc6f073fce933923f85943b94c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8455 10288 bytes

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