Malicious PDF — malware analysis report

Static analysis result for SHA-256 964188fcc53216a7…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 11:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 293be7debe183a3aaa2ca0afd6f6f038 SHA-1: 0a27f49e568874540d04add545635080f35fc717 SHA-256: 964188fcc53216a77db14a184a6b3ceb3feb2ce9fbb6dae0bd5554dd59c0148a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as an electrical wiring manual, which redirects to a malicious URL. The ML classifier strongly indicates maliciousness. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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.cc/wix?keyword=electrical+wiring+manual+pdf
    • https://static.usrfiles.com/ugd/b8c837_5d05a729c1dd4c169673ba417321a4ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_50c2136ffa7a4ac988b5cd84905a140d.pdf
    • https://static.usrfiles.com/ugd/b8c837_275842cc50904e4fadd47f82c6698bc0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lebalod.pdf
    • https://cdn.shopify.com/s/files/1/0445/2201/2831/files/zusovowa.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/reglas_del_contrapunto_musical.pdf
    • https://cdn.shopify.com/s/files/1/0463/3211/7147/files/wujemupuvidovifazososu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/83419852796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/87208644089.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2550/files/80945272184.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/21_cfr_part_11_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/chained_full_movie.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
font_00_sfnt_off000054f8.bin
32a1240b7c511654cccaa5fd6ee175427f6c92c68564a5ae94bdbb7a649b49d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x54F8 5120 bytes
font_01_sfnt_off00006655.bin
53642e332d51ab3ac17473c462b3ff341d72278ff851f003b28ff5b8e9ac08ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6655 10184 bytes
font_02_sfnt_off000088bb.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x88BB 4324 bytes