Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd578e92bc20728…

MALICIOUS

PDF

53.2 KB Created: 2020-08-08 06:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 847699c95fc3dc248fb5954b081c3579 SHA-1: f8c2ead61e9faed37a60bec12d32167b2f2306fd SHA-256: 5cd578e92bc20728593a02f9205085d3293fb4ae7e61be43e08ba6c98d4dfae3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of links, many pointing to a redirector service, disguised as a Salesforce certification study guide. The primary malicious URL identified is https://ttraff.com/pify?keyword=salesforce+admin+certification+study+guide+2020+pdf, which is flagged as malicious. The document body also contains embedded URLs, suggesting an attempt to direct users to malicious or deceptive 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.com/pify?keyword=salesforce+admin+certification+study+guide+2020+pdf
    • http://files.crimsonacresfarm.com/uploads/1/3/1/4/131437655/dukobusamuxa_salazetulegu.pdf
    • http://files.njtaxis.com/uploads/1/3/1/4/131452878/b219a1f770eb191.pdf
    • http://files.morethansoulfood.com/uploads/1/3/0/7/130738876/vidorot.pdf
    • http://files.berryblueboutique.net/uploads/1/3/1/1/131163540/2195466.pdf
    • http://files.gospeltrumpet.net/uploads/1/3/1/3/131384573/2807409.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/76942607145.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3570/files/troybuilt_horse_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6424/5925/files/83223937412.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/rudelevokefasopime.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/stoelting_anesthesia_and_coexisting_disease.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/8555384198.pdf
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/88912819356.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9645/files/papadixotawotenora.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/ammonia_vapour_absorption_refrigeration_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebisineseboji.pdf
    • https://cdn.shopify.com/s/files/1/0435/2471/8746/files/91793035047.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/sewezuzovubugapudasigune.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d4.bin
07306edbd7d96702da8b019836f5cd9b67c0b55e969a9f5ca95e03a2297c917f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D4 5952 bytes
font_01_sfnt_off00008d0b.bin
1c5655bb7f52ab95b6e98424e7f2e3dd398bd38b580d1fe112bc069b893033d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0B 10560 bytes
font_02_sfnt_off0000b175.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB175 16164 bytes

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