Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca3408fb46cc28e…

MALICIOUS

PDF

38.8 KB Created: 2020-08-30 23:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 653b792d9336c6fb723c3a954eec4d61 SHA-1: 80fac4b9392580e67878e4e560810d90e2236987 SHA-256: cca3408fb46cc28ef61652b57c013ea0a137cd2f8a260d0996ece77daf89acc1
120 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While the document body contains garbled text, the presence of the malicious URL and the link farm heuristic strongly indicate a malicious intent, likely to lure users to harmful sites or potentially distribute further malware.

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=humming+letras+monty+g
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/free_bass_guitar_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8837/files/fexakofebisewogunov.pdf
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/nezipisebixajap.pdf
    • https://cdn.shopify.com/s/files/1/0443/6888/7964/files/34511779084.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/adani_power_bill_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/example_of_phase_1_biotransformation_reaction_are.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/sigotafoxenatetolinedonaw.pdf
    • https://static.usrfiles.com/ugd/3f80ec_621398dc3a0f4e06bbb265eff50a2eb2.pdf
    • https://static.usrfiles.com/ugd/b8c837_c76a66380c9f4b50990411721f5d42fe.pdf
    • https://static.usrfiles.com/ugd/0cd019_9967705613c1410d9acce075f382c76e.pdf
    • https://static.usrfiles.com/ugd/136d07_169a02ee11a74527b03acf6ec8abc6d4.pdf
    • https://static.usrfiles.com/ugd/33c377_a7c680b3888f44e3b996f75711e8ac1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_da29784fddc941709d1303eb22aad9c3.pdf
    • https://static.usrfiles.com/ugd/2ac701_ab233687a2b740c5af2522fe8f5b13ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_f51b578cdb8a458c946aa13a31110476.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_off000058f2.bin
2f1a731b01d0614c5cbcaf10952e17a4d51f7ccf2458a5b5a15dd434f45a3a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F2 5068 bytes
font_01_sfnt_off00006a17.bin
6b369e8ee5edee03c56264877bddae1ac7331e0e461850a6d937526cea6354c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A17 10788 bytes

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