Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e39745e0938be9…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 17:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d4b08861efd92122dc6b4c80ba49839 SHA-1: 2336ade1474fdf608df78dfefdef9c36a1b8b10f SHA-256: 67e39745e0938be9d01c1a8b505cba344c31b53d30dc9afe973a3df305594827
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 pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains URLs that are part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=candlestick+patterns+pdf+in+telugu
    • http://zutijib.jwsavageinvestigations.com/uploads/1/3/2/7/132710712/fixut.pdf
    • http://files.jeremyleewolin.com/uploads/1/3/1/4/131483042/rufixiku.pdf
    • http://files.spashphysics.com/uploads/1/3/0/9/130969190/xitasutapavojuxi.pdf
    • http://kafimis.rabbipauljacobson.com/uploads/1/3/0/7/130776407/jidida.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/sidunuwugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1290/7423/files/pejijubezarudowewa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/tipos_de_cilindros_hidraulicos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9842/2934/files/74965862859.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/soveleniraxijaruva.pdf
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/mesonutejetefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/bewulalogumamedivakep.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/cards_against_humanity_expansion_german.pdf
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/autocad_to_converter_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/2639/8888/files/acknowledgement_sample_for_dissertation.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/jepejimozuretetewokabisex.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/86137806821.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_off000073ce.bin
67b8e5109b269096101c9b7f669289b36a63bf6cc7360e06c9a4d4dab3f0c9bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 5292 bytes
font_01_sfnt_off000085de.bin
8f34cd8cfa8cb7b8eb198d88e07a861916048cbe536eb6296ffc8925eaa913c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DE 10160 bytes

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