Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2631664cdd86aa5…

MALICIOUS

PDF

42.0 KB Created: 2020-08-19 06:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25d2a61fed299a8f7d0c3a4304e3e7d SHA-1: 5620d8f7883e4df315086269c49b10cc2591498e SHA-256: a2631664cdd86aa586ddfe6a70ea23424e75f5289b89f7b13f1ac13d79022c17
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded URL points to 'ttraff.com', a known malicious redirector. The document body contains garbled text but includes the same URL, suggesting it's the primary lure. The presence of numerous links to Shopify-hosted PDFs indicates a coordinated effort 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=unguided+transmission+media+tutorialspoint
    • http://xurugara.procarers.com.au/uploads/1/3/1/4/131454012/5005904.pdf
    • http://tanolugu.enchanteddragons.net/uploads/1/3/0/8/130813747/70936de35.pdf
    • http://files.setoncrusaderscyo.org/uploads/1/3/1/4/131438499/xufekegavomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1948/4839/files/26232664410.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/wonolitazujor.pdf
    • https://cdn.shopify.com/s/files/1/0451/4122/9733/files/bimoromerowazuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7595/2030/files/62900166567.pdf
    • https://cdn.shopify.com/s/files/1/0435/6951/2607/files/74046011422.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/11th_botany_practical_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/diagramme_de_phase_de_l_eau.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/63875102737.pdf
    • https://cdn.shopify.com/s/files/1/0430/3699/9831/files/dolaponezodipatu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9376/2975/files/momupiriwufiburipobanota.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/malotexaxizufinufoluwuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/53029229037.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_off00006784.bin
a5d3cfe8672905a0302fbfb13f4f7d7d2bab9f88e8457468d87e2aadbba66ee0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6784 5272 bytes
font_01_sfnt_off00007952.bin
5bbc75efaccc2c4c15d4ba26d2238ceec6b349e443b087c4689ac3966fc68ca2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7952 9896 bytes

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