Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a518135256653ea…

MALICIOUS

PDF

39.0 KB Created: 2020-08-24 01:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9df2c248a7039dfce7a752e8c5f4f306 SHA-1: c9bc6454cace63eb507d82349dbd48830522463a SHA-256: 2a518135256653eae2c09331a3e1cadbb930dd645136fd7d930a7fd633d7e2c4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on potentially suspicious domains. The document body, though heavily obfuscated, contains the primary malicious URL. The ML classifier strongly supports the malicious verdict.

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=coway+air+purifier+manual
    • http://rasawokal.idealformsnyc.com/uploads/1/3/1/6/131637136/4f3ecdc7c76adae.pdf
    • http://vedupuwi.onhisrock.org/uploads/1/3/2/7/132712011/2088239.pdf
    • http://files.yorkunidarts.com/uploads/1/3/1/3/131398367/kibovafi-wodumomizarexe.pdf
    • http://lepugog.stjosephcommunityschool.com/uploads/1/3/1/3/131383388/006eeb49770.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/datasheet_ldr_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2913/files/introduction_to_statistical_learning_hastie.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/the_economist_may_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/pinball_wizard_tab.pdf
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/yahoo_answers_health_and_beauty.pdf
    • https://cdn.shopify.com/s/files/1/0463/4909/0978/files/rebowuxusimoza.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/69965771862.pdf
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/36091663011.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/98253456436.pdf
    • https://cdn.shopify.com/s/files/1/0440/5411/8550/files/39848934333.pdf
    • https://cdn.shopify.com/s/files/1/0438/8959/0427/files/puvedifomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0890/9734/files/96043895517.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_off00004db0.bin
7bf7997bfcdd0189d425157ba184696d9195f6fd7d2d7be21fe61e33629eb077
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB0 4888 bytes
font_01_sfnt_off00005e4c.bin
07ebf2a5e30c7d4a6ab9d5a3feede886039d670c3902bf721c441069f0b62e26
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4C 10188 bytes
font_02_sfnt_off00008127.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8127 4324 bytes