Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d267b64679489ca…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 06:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ba2811019be00385031741369082501 SHA-1: 92082edd391dcaa933740a15fd10d442f147ca42 SHA-256: 8d267b64679489cad70bedfa98610f6971892b795937bb9ece83f85068aba57d
160 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body itself is heavily obfuscated, but the presence of numerous external links, including a link farm, suggests a lure to external malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be intended to trick users into believing they need a password to access content, a common tactic to bypass security gateways.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=aphidius+sp+pdf
    • http://files.ucbclaaofsd.org/uploads/1/3/1/3/131398515/cadc008d8af1.pdf
    • http://files.creswellclubhouse.org/uploads/1/3/1/4/131453194/zelutasuga.pdf
    • http://files.stephethornton.com/uploads/1/3/0/7/130740138/8591014.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/87988187684.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/tratamiento_de_residuos_organicos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/61433635934.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/54546309418.pdf
    • https://cdn.shopify.com/s/files/1/0437/7395/2158/files/bride_and_groom_trivia.pdf
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/30518013580.pdf
    • https://cdn.shopify.com/s/files/1/0433/8561/8583/files/73031379814.pdf
    • https://cdn.shopify.com/s/files/1/0432/6378/7170/files/jilewitalinasavupetoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/0559/1200/files/6295084646.pdf
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/finavunajuwapije.pdf
    • https://cdn.shopify.com/s/files/1/0434/5724/9430/files/30097204518.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/76528516659.pdf
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/28464013050.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/dibitosozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/50179849324.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_off00006460.bin
d0f908b4d857ebe1cc3113f525ccbe8c5656315625c30e2eb473bfc45bf79ab1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 4780 bytes
font_01_sfnt_off000074a8.bin
4165ef3d804b6cbaa6163e6db9dfa756f0453fbb024e789d0b8bfc91548ba311
pdf-font-stream PDF embedded font (sfnt) at offset 0x74A8 9860 bytes