Malicious PDF — malware analysis report

Static analysis result for SHA-256 d659f8d20eff53a2…

MALICIOUS

PDF

70.3 KB Created: 2020-08-08 02:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f7c1406810202c0e3e7410c1fcb77ff SHA-1: 00fd37a34d2dc67831255217579e218896352bd6 SHA-256: d659f8d20eff53a26c565e3ed6b0eb63313fe6756eb54a6a3bc65d147c44d17e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=azo+dyes+used+in+textile+industries+pdf, which is also flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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=azo+dyes+used+in+textile+industries+pdf
    • http://files.dinas-decor.com/uploads/1/3/0/8/130813781/de56c7773ad96d1.pdf
    • http://files.mirandatinaphotography.com/uploads/1/3/0/7/130775520/tamisonanisagisu.pdf
    • http://files.gympiemassage-rehab.com/uploads/1/3/1/3/131381553/8f3b0b5a.pdf
    • http://files.danielbakermedia.com/uploads/1/3/1/4/131453188/xigafodozizaromo.pdf
    • http://xobir.totalsupport.org.uk/uploads/1/3/1/1/131164250/riwusezozibiret.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/62998693838.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/ruxalibegosorojolole.pdf
    • https://cdn.shopify.com/s/files/1/0440/3511/3110/files/pdf_to_word_converter_app_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/3865/3086/files/sobokifexesetaxifal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49839171509.pdf
    • https://cdn.shopify.com/s/files/1/0437/1290/5370/files/11434643260.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/tupefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/xikeravetizikupedumur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/pokemon_ruby_gym_leader.pdf
    • https://cdn.shopify.com/s/files/1/0440/4323/9589/files/86910948870.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/23572552314.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/penodizixewodanetirafir.pdf
    • https://cdn.shopify.com/s/files/1/0428/9223/0823/files/9761331867.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d689.bin
379719a7a3314af4c3d11c236a530f47f7907161dd278d6336448aea840f4335		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD689 5032 bytes
font_01_sfnt_off0000e7d2.bin
add74237ac81612e8db0d1aabeca048f4c29a0ee871a55b02642c6ff35bc3901		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D2 10536 bytes

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