Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8419fd47a270343…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 07:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a11b77c87ac0f14037bb57dd33e0d105 SHA-1: c333a997c44a54036cad7c270614233259b20d10 SHA-256: d8419fd47a2703430809a58df6d9e791d18b04f668252f0039fc284b19792b6e
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 URLs, particularly the one pointing to 'ttraff.ru', are indicative of a redirection scheme. The document body, though heavily obfuscated, contains references to the 'ttraff.ru' URL, reinforcing its role in the attack. The primary goal appears to be directing users to malicious infrastructure.

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/wix?keyword=insignia+google+assistant
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/xevikixiwenikufobowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0259/2410/files/83746810200.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/child_anger_management_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0428/4848/5535/files/96729271118.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3880/files/handbook_of_green_building_design_and_construction.pdf
    • https://static.usrfiles.com/ugd/93c935_2de52b40fc4e4c92827f42b2ecf636fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_3430b57eb72440158e15e13c15b71568.pdf
    • https://static.usrfiles.com/ugd/1fbf8b_14f289d6c6b54a1d8c1b6b1ab1565bef.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa1ed2993df2487d960fe704b1703569.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/jawudademo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7218/3710/files/91801868923.pdf
    • https://cdn.shopify.com/s/files/1/0430/4519/1841/files/keto_recipes_free.pdf
    • https://static.usrfiles.com/ugd/760101_d423fdeb4f8a48b8ac9421624f59b345.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2bdaabe6eac49cabe9427dcaf520c74.pdf
    • https://static.usrfiles.com/ugd/7dd30d_02675a4e43254edebb8da9a8699527e0.pdf
    • https://static.usrfiles.com/ugd/eb4c03_5b23a9caa1bc40b5b1d6f65624f5bea1.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_off000063fd.bin
4dac4c8b725126f527a672ac667ca3de63f0a73b04a59882b0360388262596ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FD 4696 bytes
font_01_sfnt_off00007402.bin
31d90c06341ae692792713e643646ea24d0ed684b7c56447b20d3c028d9d8d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7402 11048 bytes

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