Malicious PDF — malware analysis report

Static analysis result for SHA-256 652586d98de2a63c…

MALICIOUS

PDF

52.0 KB Created: 2020-08-06 17:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3658a3e20d69dc365f54c3d4ec10dab SHA-1: 7994a89953944ce9654e2c901a5bf55cf605fa0d SHA-256: 652586d98de2a63c69c7996cbcd7cbb1d620505bfdf1abeb1ef157c3f2b67832
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning attempt to distribute malicious content.

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.cc/pify?keyword=ahmedabad+brts+bus+timetable+and+route+pdf
    • http://files.catoctincounseling.com/uploads/1/3/0/8/130813550/16d90b8564a.pdf
    • http://files.thefrancisfuneralhome.com/uploads/1/3/0/7/130775023/wopuvewanovanil-pifotogape-rowofiretil-jalolaguwibeta.pdf
    • http://files.stonehavenspallc.com/uploads/1/3/1/4/131437508/sikolesivirefakas.pdf
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdf
    • http://zowedi.gregorystringfield.com/uploads/1/3/0/7/130776661/ba0163d9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/vofukaluvow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/light_reflection_and_refraction_class_10_sample_papers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/xexowalixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7589/files/pats_small_engine.pdf
    • https://cdn.shopify.com/s/files/1/0429/3125/7510/files/midland_75_822_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/25637302206.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/fokitiwekuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/44612095306.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0435/5463/5937/files/solving_quadratic_equations_gcse.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000780f.bin
a97116ec0193a57d16a5ec5eed4c34ef4abd805ab1507b71f55d2904efca84e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 5412 bytes
font_01_sfnt_off00008a3d.bin
1f3239ec5d54e85d70b5685cb71f1ee09e9360c6fcacdeece02bb06200900183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 10324 bytes
font_02_sfnt_off0000adc8.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADC8 16164 bytes

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