Malicious PDF — malware analysis report

Static analysis result for SHA-256 748e79f43251678f…

MALICIOUS

PDF

54.3 KB Created: 2020-08-12 11:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdccdce83c3c44e0461a812e0dfc2320 SHA-1: 41c9745a8562287f8e19f06f1604ddb98ed7aad1 SHA-256: 748e79f43251678f61285765688d7610aaeec295513a213edb7b1896dff3fdc3
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.com'. The document body also contains this URL, suggesting an attempt to trick users into downloading a seemingly legitimate PDF that instead leads to a malicious site. The presence of numerous other PDF links further supports a link farm or SEO manipulation tactic.

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=developmental+psychology+childhood+and+adolescence+8th+edition+pdf
    • http://files.skyenestler.com/uploads/1/3/1/3/131383821/bezikegasabom-lowanaxet.pdf
    • http://xelojuzuv.missdivakurves.com/uploads/1/3/2/6/132695384/cff530c8.pdf
    • http://files.eyelikegallery.com/uploads/1/3/1/4/131453610/vexesuduvarirusemam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/xamulizofovubifuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/vejakalajuko.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/dexezuduwerawomogefek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/9401474562.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/69298849274.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/aluminium_6082_properties.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/jatilaroripuxujotef.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/53544815834.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2767/files/92242245322.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/83411370992.pdf
    • https://cdn.shopify.com/s/files/1/0440/3567/0166/files/vebuza.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008737.bin
106b80b431dccae281bd850b8817d6dfec4e05151dc86b3dd36bb09d99d91e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8737 5616 bytes
font_01_sfnt_off00009a30.bin
3e698b7266cbb3ed4e15cb81ccc8e6bc4bb05b81bd94c8ba6fd0a6f72d27efe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A30 10416 bytes
font_02_sfnt_off0000bd8b.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8B 4324 bytes

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