Malicious PDF — malware analysis report

Static analysis result for SHA-256 651ad2884fe3c212…

MALICIOUS

PDF

36.7 KB Created: 2020-08-30 13:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26e8c03903d1cc57d837c4223c7c2837 SHA-1: 54478a629eb5e6191ad9cf4dc99301b894ae8ea4 SHA-256: 651ad2884fe3c212669bd348ac9c8a66a13cccd80fb6a7258ec99f5ce44fe2e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that redirects to a known malicious domain, disguised with a keyword related to a popular movie. This suggests a phishing or scam attempt to trick users into visiting a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=borat+full+movie+watch+online+free+hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d7ba0f_38225eb126a442ddb379947e677e24b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_0914cf91d1d74eb097ffca1d1712fcdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_03bb5753474e47d880010b5f37b57099.pdf
    • https://static.usrfiles.com/ugd/e3c460_4a72290c71e84351a1458cf6142462d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_fca9b70c27e743ee82280ac60cf0ac31.pdf
    • https://static.usrfiles.com/ugd/b13fd1_498875105bcf4a0b9068977b48161907.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/velis.pdf
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/animal_crossing_city_folk_clothes_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/fedora_28_workstation_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/2883/9581/files/pamotapofozikitukifaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6863/files/98226405883.pdf
    • https://static.usrfiles.com/ugd/b8c837_70bdf55477a54863a2aab8f1195cbc7b.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_32b2690d902541ff845eb29456246d2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c6863ba88144bb3a23b51bf74ff5727.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050b0.bin
6041a263c9cb8baaef3fb9291b7cc19116328dc1a9853c8de38b9925c619495e
pdf-font-stream PDF embedded font (sfnt) at offset 0x50B0 5284 bytes
font_01_sfnt_off00006293.bin
a6e0cd848d8b53cab53b87336d14511c8ddeedd123c7731bfca2782b18cbe823
pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 10452 bytes