Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ad2bcf39cc92a2…

MALICIOUS

PDF

39.0 KB Created: 2020-08-11 06:15:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c004108cfb6d3f070ec0b79e1d312e1 SHA-1: 6ad89e17046d6628abf45ce83b67c89f34cfd62b SHA-256: f4ad2bcf39cc92a2985f5211b54b7ce0a8a33d50a873c6c29a78de63f9e3941c
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=blank+periodic+table+printable+pdf', suggesting a lure to a malicious site. Another heuristic indicates a link farm, with many links pointing to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility.

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.ru/pify?keyword=blank+periodic+table+printable+pdf
    • http://xivamum.neuralmechanisms.org/uploads/1/3/1/3/131383483/da669cdc7c5.pdf
    • http://files.iotcoresoft.com/uploads/1/3/1/4/131410299/guzabejago-vumikosureruji-pilulutenora-wumurur.pdf
    • http://files.parentingincontext.org/uploads/1/3/1/4/131406049/mosat.pdf
    • http://files.avsone.com/uploads/1/3/0/7/130739780/2892738.pdf
    • https://cdn.shopify.com/s/files/1/0435/2924/0727/files/simila.pdf
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/zobitapeluxanedimibuko.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1468/files/ielts_academic_vocabulary_list_of_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1695/files/xekelop.pdf
    • https://cdn.shopify.com/s/files/1/0437/1742/7352/files/adblock_ie_11.pdf
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/magento2_invoice.pdf
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/adventure_time_battle_party.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0430/9345/9093/files/faxifonediwuloredef.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/25403697193.pdf
    • https://cdn.shopify.com/s/files/1/0435/5581/5583/files/vejibudeninasoxuvebepa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/wamexofewupegowokol.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_off00005d22.bin
f6675a6ab3d06b5588e53b8932c5f3ba0413bafa1ae8d3e4b0fb60b4ed3a1576		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D22 5224 bytes
font_01_sfnt_off00006eee.bin
61090a8f1f93fb5c9c8a7c231249b4f21e7cff8fdcee8680c8de8e02b6f59bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEE 9380 bytes

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