Malicious PDF — malware analysis report

Static analysis result for SHA-256 225d50a0b1926cc9…

MALICIOUS

PDF

44.2 KB Created: 2020-09-18 00:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 012f43bf068c89c8c6085de3ac21bbce SHA-1: 5d8dcd385093996fefee6c3943b8373aca45fe24 SHA-256: 225d50a0b1926cc91099032fc797143f3102436d1484513bd212354b2b446b10
150 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 URL known to host malicious content. The document body, though heavily obfuscated, appears to contain keywords related to academic study, suggesting a lure to disguise the malicious intent. The primary malicious URL identified is https://ttraff.cc/wix?keyword=hamlet+study+guide+questions+act+1+scene+1.

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/wix?keyword=hamlet+study+guide+questions+act+1+scene+1
    • https://6d1246e8-bc53-4625-84f6-6b3e9017ae71.filesusr.com/ugd/7598fa_8ec01c5f48c74a719a386ca8e445bfb1.pdf?index=true
    • https://68d8e0fa-9a03-41a5-a00b-ac6f4672318b.filesusr.com/ugd/40512e_dcf5da82b73a467f90b943865e8b69ec.pdf?index=true
    • https://a2965b30-dee7-46c3-a0f8-3a88b71211d8.filesusr.com/ugd/ee9d3f_671be8e1d3b84582a7c676a632d24984.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/lakuxemiworexanarol.pdf
    • https://cdn.shopify.com/s/files/1/0432/0192/1184/files/74070080667.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/xukolikakevutapulalejodoz.pdf
    • https://cdn.shopify.com/s/files/1/0461/8954/3582/files/29220840640.pdf
    • https://cdn.shopify.com/s/files/1/0457/9016/7206/files/80052783956.pdf
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/vegar.pdf
    • https://cdn.shopify.com/s/files/1/0440/1194/6134/files/videf.pdf
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/31941886626.pdf
    • https://cac8f647-839d-405d-965e-e157065147e9.filesusr.com/ugd/225520_559271b1c8554e68a927c99bcd8c47dd.pdf?index=true
    • https://6c36255e-896a-4394-8443-da524a598a1b.filesusr.com/ugd/b7306e_790db478af7244b58e101a07102707cf.pdf?index=true
    • https://d945a884-2d5f-4763-9e52-a76029b8a5aa.filesusr.com/ugd/bae0a0_5b2911597c044fad8d02a220f474e1c2.pdf?index=true
    • https://d912e1f3-4c5a-429a-8f49-bd036e8fd199.filesusr.com/ugd/a58b01_90f715bb3ad44795827a11dae4569ab7.pdf?index=true
    • https://2ba940f4-def8-47c6-90ca-e5943b748cb9.filesusr.com/ugd/fedf23_53797dd685574374a12a57f2bfd3fb17.pdf?index=true
    • 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_off00006bf4.bin
ea5a00ef3fea06451411dff180fe6763341aa76d5580bbcfff6895730c96b2d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF4 5404 bytes
font_01_sfnt_off00007e49.bin
5a814bcc28aad06806d9136218ca8ddfef9c017b800225aef41d6c448793b807
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E49 10484 bytes