Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d45f7461432e794…

MALICIOUS

PDF

40.8 KB Created: 2020-08-28 09:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6631ec9d9f9aa7bb76b268024120bc45 SHA-1: eaa1a0ba545915a72afb3d7cce269eec8b9c21cf SHA-256: 5d45f7461432e794f0a6149f0b2117d84472210a36ab994c2db2ced382ea7f8e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier and contains numerous embedded links. One of these links, 'https://ttraff.ru/pify?keyword=la+batalla+en+el+desierto+pdf', points to known malicious redirector infrastructure. The document appears to be a link farm designed to redirect users to potentially harmful 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.ru/pify?keyword=la+batalla+en+el+desierto+pdf
    • http://files.kpscritters.com/uploads/1/3/2/6/132696598/gasikawafetolefu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/android_version_names_a_to_z_list.pdf
    • https://cdn.shopify.com/s/files/1/0453/2790/9019/files/bonetusadorafimuzuzixa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/47332672250.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/vopokabi.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/android_18_dragon_ball_legends.pdf
    • https://cdn.shopify.com/s/files/1/0462/3810/5749/files/80104098948.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/31976246928.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/bronconeumonia_en_perros.pdf
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/tetivowo.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_off00006105.bin
f1a4f383f17e35e2d65a3871dc181dbfe8306e2f6e8b0e5accd38a3b46df8469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6105 5116 bytes
font_01_sfnt_off00007271.bin
271380f4a58dac1b8d018bc77a1273a4d0fdd7ffff956a25fa0e5023f027bf3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7271 10704 bytes

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