Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d6e21201db4315…

MALICIOUS

PDF

46.9 KB Created: 2020-08-08 22:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ea1c7bb3a0e6953d94bf05b69c16ae4 SHA-1: d0840e717d98abc1e062b91513430183fb872906 SHA-256: 67d6e21201db4315c1d0e35e6a5a504a536c78d7c79f51fee0ed6f568e97a3f5
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector infrastructure at 'ttraff.cc'. The document body, though partially garbled, suggests a lure related to Cameroonian government departments, likely intended to trick users into clicking malicious links. The presence of a link farm and a high ML classifier score further indicate malicious intent, possibly for phishing or distributing further malware.

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=d%25C3%25A9partement+et+arrondissement+du+cameroun+pdf
    • http://files.jclandscapingandmasonry.com/uploads/1/3/1/6/131637014/novixomuse_zagipezamej_karatekaze.pdf
    • http://fekuxat.fantailphotos.com/uploads/1/3/1/4/131453870/mezawepiroselujebuga.pdf
    • http://files.oregonmade.org/uploads/1/3/1/3/131380531/zebata.pdf
    • http://files.yourtexaspatio.com/uploads/1/3/0/7/130775286/zetiti.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2965/0856/files/kegimunit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4518/2888/files/denumofujetumewev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/nenazizawonunewuvurodi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5340/6618/files/ai._type_keyboard_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/95561910569.pdf
    • https://cdn.shopify.com/s/files/1/0431/7570/6788/files/mupobuxogagu.pdf
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/40608701565.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/iso_9002.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/calendar_2020_printable_with_holidays_uk_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6940/6360/files/oxford_dictionary_english_to_english_to_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0434/7763/1126/files/17668744068.pdf
    • https://cdn.shopify.com/s/files/1/0454/7464/4120/files/robotica_para_nios_de_primaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89186344985.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_off0000737c.bin
2c32b07108af3482360ba09b313719a8304e4f5fdfec2166c92e74dee695bcf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737C 5408 bytes
font_01_sfnt_off0000858c.bin
f9e973894b505bf633c0d26794635edd1b199a79126731cb884f55c9ecb88a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858C 12020 bytes

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