Malicious PDF — malware analysis report

Static analysis result for SHA-256 3831c641385f08da…

MALICIOUS

PDF

36.3 KB Created: 2020-10-31 19:13:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b57a3b865bed00e295c828dd252c418c SHA-1: b89431316792058ed5cbc894be976372b6e3e2b8 SHA-256: 3831c641385f08dae9c3d41b722cda2561033fd5fca05aa6bfce9c415e9ba2a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'guide officiel final fantasy 8 fr pdf'. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site, likely for phishing or to download further malware.

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://ggtraff.ru/pify?keyword=guide+officiel+final+fantasy+8+fr+pdf
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f96f632d0bfd.pdf
    • https://cdn-cms.f-static.net/uploads/4379498/normal_5f8bfc94b8af9.pdf
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f87b3ab06c76.pdf
    • https://cdn-cms.f-static.net/uploads/4403259/normal_5f9bedc67b9a2.pdf
    • https://cdn-cms.f-static.net/uploads/4421623/normal_5f9a908135e3c.pdf
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5f9c6d72bae83.pdf
    • https://cdn-cms.f-static.net/uploads/4407301/normal_5f9359c110506.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/copper_2_nitrate_and_ammonium_sulfide.pdf
    • https://cdn.shopify.com/s/files/1/0501/7013/4683/files/54562944181.pdf
    • https://cdn.shopify.com/s/files/1/0507/1955/5780/files/mejepotaworijununokafuk.pdf
    • https://uploads.strikinglycdn.com/files/252d71f6-af4d-4e35-a703-8af743de1ef2/51793849491.pdf
    • https://cdn.shopify.com/s/files/1/0433/4292/1886/files/router_guide_rail_makita.pdf
    • https://cdn.shopify.com/s/files/1/0483/8929/2184/files/81974134453.pdf
    • https://cdn.shopify.com/s/files/1/0268/8984/6975/files/20522817687.pdf
    • https://cdn.shopify.com/s/files/1/0500/2133/5189/files/arris_tg862_manual.pdf
    • https://cdn.shopify.com/s/files/1/0500/9919/2003/files/nitojureditafafi.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_off00004e91.bin
2d17b12c800aa3332409299bc89490d82e4e904e2c833e68f73de2b58a740012
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E91 5476 bytes
font_01_sfnt_off0000614e.bin
b81b7cb9a79f464a6eab43000bed8b9f949ee7ac8749c82473cc35b73f0a7524
pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 10144 bytes