Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95f8d15263b5ad5…

MALICIOUS

PDF

44.4 KB Created: 2020-08-03 06:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd46c1d9a5dc360bbdbf7d13a45eee80 SHA-1: c1cc5663376ac70caecef214219195be989b99c0 SHA-256: e95f8d15263b5ad5a2b7b3e238aa8f7a6aea4ae0876cfb692ca5a473f00ef234
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one directing to a malicious redirector at 'ttraff.com'. This redirector is designed to lure users into downloading further malicious content, likely by impersonating a free PDF download for a technical book. The ML classifier strongly supports the malicious nature of this PDF.

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=microelectronic+circuits+7th+edition+pdf+free
    • http://files.calojostaffords.com/uploads/1/3/0/9/130969404/kituzere_xavidefumevik_bimaxisimagexaj.pdf
    • http://files.lisasturm.com/uploads/1/3/0/7/130740412/niresufijoxusagepa.pdf
    • http://files.neatfreaksavl.com/uploads/1/3/1/4/131452949/rakekurukawebus_kavasozokuza.pdf
    • http://files.somethingsomethingtheater.com/uploads/1/3/0/8/130874240/8002320.pdf
    • http://files.bellamusicaacademy.com/uploads/1/3/2/7/132740594/1d41ba.pdf
    • https://cdn.shopify.com/s/files/1/0434/7451/8178/files/73261144720.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1085/files/tojupobasuvibiwujakupojew.pdf
    • https://cdn.shopify.com/s/files/1/0431/8524/2269/files/kekaxikuxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8439/8236/files/vujamesokonu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/60946627506.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/gaxujutejoporiruzupidot.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/futokaneromefa.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/75538311389.pdf
    • https://cdn.shopify.com/s/files/1/0435/2009/8472/files/34264511177.pdf
    • https://cdn.shopify.com/s/files/1/0447/2619/0234/files/macy_annual_report.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_off000057f0.bin
9cc435a83a7d0eda5408a9910af9896655da7dd58d4ee7257d1dbfb5c99f09f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F0 5116 bytes
font_01_sfnt_off00006962.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6962 2116 bytes
font_02_sfnt_off0000732c.bin
0350eca6968a4925517b0aef3038a615595b8e86a22a2d1cfa659ee73d6d5e1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732C 15352 bytes

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