Malicious PDF — malware analysis report

Static analysis result for SHA-256 3268cbcf33838b34…

MALICIOUS

PDF

41.2 KB Created: 2020-07-29 08:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e55eceb65debfdb6d36c934bea19b4 SHA-1: 1df12a37a6b751028a0f3d22d8026fd79e8e0c09 SHA-256: 3268cbcf33838b3445f1e40afa3dc54cb5a8ef89b294d86d9d6a8e50eec668b8
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'black friday movie free 720p', suggesting a lure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=black+friday+movie+free++720p, which is likely used to redirect the user to further malicious content. The ML classifier also strongly indicated 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.ru/pify?keyword=black+friday+movie+free++720p
    • http://files.lindalauren.com/uploads/1/3/1/4/131406403/milizuka.pdf
    • http://files.cloverdale-ae.ca/uploads/1/3/0/7/130739315/wuxusagubadijifufup.pdf
    • http://files.lindyhop.gr/uploads/1/3/0/9/130969710/910ab07a77ff3c1.pdf
    • http://files.sophiehacker.com/uploads/1/3/1/4/131437987/c366c5321214.pdf
    • https://cdn.shopify.com/s/files/1/0434/6858/7174/files/litovaporenowibujuwaro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2831/5288/files/11153366259.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/jetoxibizusofejev.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0304/files/78138977748.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24501063531.pdf
    • https://cdn.shopify.com/s/files/1/0437/8161/9861/files/96492126445.pdf
    • https://cdn.shopify.com/s/files/1/0431/0679/5686/files/wajejevijuluvexuninodesef.pdf
    • https://cdn.shopify.com/s/files/1/0437/0271/4536/files/lometusoxavukukojejej.pdf
    • https://cdn.shopify.com/s/files/1/0437/6097/6021/files/tiwatixuzonebixilotukos.pdf
    • https://cdn.shopify.com/s/files/1/0428/4783/0183/files/mitebuxubavimomufadekitif.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_off00006252.bin
fb85590bfbf0351012c41082c8d2036196c782ede37f384dd2caeaa50334d843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 5356 bytes
font_01_sfnt_off00007495.bin
87c919af179ee91bc1d18b7a27c19c87bda5f367ff51b5037f5f9a9886b67cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7495 10412 bytes

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