Malicious PDF — malware analysis report

Static analysis result for SHA-256 10a194acb4886875…

MALICIOUS

PDF

47.8 KB Created: 2020-08-31 22:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e5c309c00feddeb524415e155ba140a SHA-1: 6f00a4f4942d5cb1fa44afa026413c1289fc8a74 SHA-256: 10a194acb4886875895f8bd713aabd5afc1ac7ac12d4b04d54b4fbcfe07ee700
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, suggesting an attempt to lead the user to malicious content. The ML classifier strongly indicates malicious intent, and the presence of a link farm further supports this. The document body, though heavily obfuscated, contains the redirector URL and references to e-commerce templates, likely a lure.

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/pify?keyword=bootstrap+4+template+ecommerce
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/zibusasejepoforeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/kuta_software_infinite_algebra_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7606/files/zewomokujopexo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/nuwave_oven_pro_manual_complete_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/gefakozimimuzadanok.pdf
    • https://cdn.shopify.com/s/files/1/0433/8958/3514/files/jitanadire.pdf
    • https://static.usrfiles.com/ugd/455f95_71cee377316b46619e1b9d6ae370a7b0.pdf
    • https://static.usrfiles.com/ugd/8d57bd_4be14f4e22b9429e949f065db7a77c55.pdf
    • https://static.usrfiles.com/ugd/d17951_7abeb19f53944059b5b389c8af25f411.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_d26010f1bb364ed39876bf5e8099bf6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb0b269674d1435fa64e45e31a845c02.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_e21cd33d1d894e069c412bc2bfd11785.pdf
    • https://static.usrfiles.com/ugd/dc51bb_209cb4f7193742dfaa1d7232fdf8dffc.pdf
    • https://static.usrfiles.com/ugd/b972d5_750dc47b7f92466f87b86bcd3a402c25.pdf
    • https://static.usrfiles.com/ugd/aff7ca_f398feafce6d44e1b2ce4e645b25151f.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_off00007df4.bin
47e2d4c94c51ab1f75f0f1f59906c0978b2b7998c6808ebfcd699159f41d0164
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 5216 bytes
font_01_sfnt_off00008fa8.bin
e9cace019e623449dd984a30e551cbff0e12a048c7f2e07c116cfb7b4638ea18
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA8 10212 bytes