Malicious PDF — malware analysis report

Static analysis result for SHA-256 788eea2ea567dcf0…

MALICIOUS

PDF

112.3 KB Created: 2020-08-13 01:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a7723cda4f597aa1150119e9d76bc5 SHA-1: 73ab7ca79533566993233fad6f70d3fa0040bbf3 SHA-256: 788eea2ea567dcf0646508baa5061b05e3c59bcdd0dd2d009aefeeba42885a8c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly indicates maliciousness.

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=santa+biblia+de+jerusalen+pdf
    • http://wuvejidos.biblegematria.com/uploads/1/3/2/8/132814664/7026924.pdf
    • http://fegazoril.marissabellino.com/uploads/1/3/1/4/131406744/kuguter.pdf
    • http://gilovogi.pdsummit.ca/uploads/1/3/0/8/130814328/zusovagoxomumof.pdf
    • http://files.rsiministry.com/uploads/1/3/1/4/131437669/pelumenex.pdf
    • https://cdn.shopify.com/s/files/1/0443/8904/0294/files/localhost_test_php.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xutowoterefabobenovise.pdf
    • https://cdn.shopify.com/s/files/1/0440/0644/1110/files/28061856994.pdf
    • https://cdn.shopify.com/s/files/1/0430/7556/7777/files/17805761847.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/critical_thinking_activities_for_middle_school.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/the_cask_of_amontillado_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/arsenic_toxicity_and_potential_mechanisms_of_action.pdf
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/garmin_nuvi_1350.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/vejudebitatiwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1415/0553/files/gadepupobojixed.pdf
    • https://cdn.shopify.com/s/files/1/0434/2012/3285/files/golerusaso.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/american_wrestler_the_wizard_english_subtitles.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/81033181558.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/kuvesuk.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_off00017aa4.bin
82778e0fc1e2450b58653a2f112334350b1502362372d0bc21188a34d33216fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA4 5352 bytes
font_01_sfnt_off00018cdf.bin
b75aff7b5c4a82a2b0dfbcba6e1a8df8e38706a5aacc79cf4ef903d40d6fa940
pdf-font-stream PDF embedded font (sfnt) at offset 0x18CDF 11460 bytes