Malicious PDF — malware analysis report

Static analysis result for SHA-256 902fadc8808a5487…

MALICIOUS

PDF

46.7 KB Created: 2020-08-30 01:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3b76447f55df7bc80e1c19ca3addfd4 SHA-1: 7709daa1cf5adeb2e5750854fb2ae79cc01868fc SHA-256: 902fadc8808a548736c072c44716fc2607e8de71bb2dba2ddb5734823afee64c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=aircraft+flight+operations+manual'. This URL is presented within the document body, disguised as a flight operations manual. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to shopify.com domains, likely for SEO manipulation to increase visibility. The ML classifier strongly flags this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=aircraft+flight+operations+manual
    • https://cdn.shopify.com/s/files/1/0433/4131/6264/files/wisanuguf.pdf
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/formal_language_and_automata_theory_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7909/0854/files/18454007927.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/bioreactor_configuration.pdf
    • https://static.usrfiles.com/ugd/58a813_61410604cf004a1c9c6de90b69e95def.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/convective_and_local_acceleration.pdf
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/sesukojovuvakad.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/tonugixixagewugesasifix.pdf
    • https://cdn.shopify.com/s/files/1/0431/3569/7063/files/47109344902.pdf
    • https://cdn.shopify.com/s/files/1/0439/4074/1278/files/60652639102.pdf
    • https://cdn.shopify.com/s/files/1/0432/0316/6369/files/agile_methodology_in_software_development.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000094d2.bin
bb677a30cd44344192d18b22ee2eba03c36a7ee9ff2a606b43a2a238a92d1cdd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x94D2 17132 bytes
font_00_sfnt_off00005fcc.bin
41a5ef329da9eb1f78f134b372e2381d38b5a1428d2bd85db9f8ed29892f082c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 5420 bytes
font_01_sfnt_off00007200.bin
a11821b0b6fb10b375e55eec944d6e29e853287bc8aa9788d0f3592948ff6522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7200 10116 bytes

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