Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b0368d1833e15e…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 07:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87e847b5c16ef4e5bcc2fe5e171a35c1 SHA-1: d075b9ca88007796b5264cb5131d76ea3ecc872e SHA-256: 42b0368d1833e15ed3b9ca3ab976c63c9f8e9bf7bbee4229b6495f6aee92805c
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One critical heuristic identified a link to a known malicious redirector at ttraff.ru, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains the title 'Funny true or false quiz questions a' and the malicious URL, suggesting a lure to trick users into clicking the malicious link.

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=funny+true+or+false+quiz+questions+a
    • https://static.usrfiles.com/ugd/5d2cf3_6fdff5c4b4d847a690268250199910e9.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_272f8c8bff024887a4ae19fd280d6605.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_58e60d9df1b3477dbe7b3aab41c5cc88.pdf
    • https://static.usrfiles.com/ugd/912de2_e7fd2018006f48afa3da5d181a4c05bd.pdf
    • https://static.usrfiles.com/ugd/912de2_dc7f0b005cf3448bb75f483041c939ee.pdf
    • https://cdn.shopify.com/s/files/1/0434/0360/8216/files/rofebafow.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/51813212435.pdf
    • https://static.usrfiles.com/ugd/0779a3_36a75f95420046cc88f5c5cacd434a3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e013ddffe1141b6ae4e7d874a777881.pdf
    • https://static.usrfiles.com/ugd/b8c837_6eed2c5a91d44e8e9499a91278564030.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8a6eea39b3548129961693f11e0ba8b.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7270/files/vinezekezizemutax.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/bpp_acca_f1_study_text.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/pugonufikisolawebura.pdf
    • https://cdn.shopify.com/s/files/1/0430/0813/1233/files/gujadudozusok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9497/files/economist_september_1_2018.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_off000065d2.bin
aa9d17bdbe5287c5df958d64664a844d0aa226cfbfa228a8f554275a8c4166a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 4996 bytes
font_01_sfnt_off000076f3.bin
adc4a1e1e9b0a66a19ccb6343e424633abb5f381f4b86d68cf86aa36df444c42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F3 10240 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.