Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee528f178dc506ff…

MALICIOUS

PDF

53.5 KB Created: 2020-08-20 14:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993b52dbbf761e5c86dbd94ab4a8c3d1 SHA-1: 9d81158bbcc5e66177320c6e50cc3ceec92ae57a SHA-256: ee528f178dc506ff25c5df5400aa8adad2252ec6b5fdf5decdc540ae5b6c4113
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, specifically pointing to 'https://ttraff.cc/pify?keyword=medan+listrik+statis+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The presence of numerous other PDF links, many hosted on potentially compromised domains, further supports a link farm or redirection attack pattern. No scripts were extracted, but the malicious link is sufficient evidence for the attack.

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.cc/pify?keyword=medan+listrik+statis+pdf
    • http://files.gagroundcare.com/uploads/1/3/1/3/131379594/xodixaxalaret.pdf
    • http://jivofuxu.kappagammachi.com/uploads/1/3/1/8/131856726/60e6dac8754.pdf
    • http://files.adelaidechickensittingservice.com/uploads/1/3/1/8/131857071/wovakemeluwo-bokevanukapaku.pdf
    • http://kitigemu.theprintup.net/uploads/1/3/0/9/130969082/f95923ebca88.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/answer_key_of_neet_2019_official.pdf
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/mecanismos_de_absorcion_de_nutrientes.pdf
    • https://cdn.shopify.com/s/files/1/0430/4620/7650/files/9723728463.pdf
    • https://cdn.shopify.com/s/files/1/0434/7287/9782/files/46504537993.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/gesareleje.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/51049143299.pdf
    • https://cdn.shopify.com/s/files/1/0432/0706/5760/files/satabatuzil.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/nazazozakevatozuta.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/prepositions_of_place_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/22395960041.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/zip_codes_longitude_latitude.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/pafesoruv.pdf
    • https://cdn.shopify.com/s/files/1/0437/0602/4101/files/fudanowokogusomigujiz.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_off00008b37.bin
cf5d391cb72e83a76a28f0777f69caf5c48fbbe083650727e842069749e5b459
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B37 5104 bytes
font_01_sfnt_off00009ca7.bin
2c85e2f8ac13cb34fe097d8027384d51dc484b2127b529df58ac2473c9c5b3a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA7 13960 bytes