Malicious PDF — malware analysis report

Static analysis result for SHA-256 924cd63c9d846c95…

MALICIOUS

PDF

70.0 KB Created: 2020-08-06 19:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd902d5f60b74ed0f9fc2a480bb567fa SHA-1: 3cf8716ae1772e392357fbdfce5722007d66c0b8 SHA-256: 924cd63c9d846c95e89da86ab3703f061a11bff7b9bc9a1e7bb7b41782192266
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered this heuristic. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=francisco+javier+arellano+felix+pdf
    • http://xozes.ptbopathwayoffame.com/uploads/1/3/1/4/131454012/xubivalejor-nezixivuz-morere.pdf
    • http://roputaxu.appledoreantiques.co.uk/uploads/1/3/1/3/131379730/e7264.pdf
    • http://files.parsonswoodartistry.com/uploads/1/3/0/7/130775002/vowifipekuw_zenusuvuvinij_duboke.pdf
    • http://files.prettygoodideas.studio/uploads/1/3/0/7/130775109/c533b7.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/datibututakabezulogoborug.pdf
    • https://cdn.shopify.com/s/files/1/0436/9747/1656/files/68590787320.pdf
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/adb_backup_app_data.pdf
    • https://cdn.shopify.com/s/files/1/0433/4341/3407/files/tavumezajozo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3808/7070/files/albumin_physiology.pdf
    • https://cdn.shopify.com/s/files/1/0439/2094/9416/files/38998938224.pdf
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/kexawodurosufoxalegusexiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9291/7924/files/37705382333.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/58245971812.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/61576243641.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c734.bin
e264712ed2539065f8b539d3ee525ceec5ac0e06f87953703b9c71cf0cf639cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC734 5016 bytes
font_01_sfnt_off0000d84c.bin
aa2b3ac34bc490fe56f6114abde872357bf40b5def59bbf1f7174522939471b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 10688 bytes
font_02_sfnt_off0000fca7.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 4324 bytes

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