Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b617cde73e35682…

MALICIOUS

PDF

53.2 KB Created: 2020-08-05 14:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3904b9231106b0e93de97d1818fa1904 SHA-1: d836d107ce7500e5e5e362dfac3a8f70aed3849d SHA-256: 5b617cde73e356820628ab403473d41b2c7ebe13957ca969bea444b0207b89bb
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One prominent URL, 'https://ttraff.ru/pify?keyword=tesla+model+3+specifications+pdf', is identified as a malicious redirector, indicating the primary intent is to lead the user to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious 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=tesla+model+3+specifications+pdf
    • http://files.tntchildcare.com/uploads/1/3/2/3/132302924/silidosuwakomi-vomid-mufeduruvare.pdf
    • http://vesiwej.dreamythology.com/uploads/1/3/1/4/131437987/3765135.pdf
    • http://files.bertieandolif.com/uploads/1/3/1/8/131856119/19baac86af541.pdf
    • http://files.elfmastery.com/uploads/1/3/0/7/130740609/86ae25671bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/sense8_christmas_special_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/jivosikeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/vodugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/45386625992.pdf
    • https://cdn.shopify.com/s/files/1/0433/8637/2246/files/97946224376.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41326774972.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/23247300861.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6647/files/83462765879.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/english_course_for_spanish_speakers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/pesexasusutakop.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/ice_station_matthew_reilly.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3979/files/opencv_create_image_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/48127238739.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60233972239.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_off00009005.bin
d4db8a66580e789e435925353654b155655b8ddd71452c63e6ccd41a97ec60ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9005 5316 bytes
font_01_sfnt_off0000a20c.bin
fdec9752aba6cd2c335e464f37efa43a50ef40719ebe9d70ed663b093306db20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA20C 10920 bytes

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