Malicious PDF — malware analysis report

Static analysis result for SHA-256 6429ae7d5e90774f…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 01:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b91e01a060482b75fda9bc39c88845 SHA-1: d1945d02dcaad79c25e9e66262d745344bf4ab3c SHA-256: 6429ae7d5e90774f79df9ee560c4387f984bd587474c64af6615adbb95c8ac0d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Pride Prejudice and Zombies 2' and includes the malicious URL. The presence of numerous external PDF links further indicates a link farm or redirection strategy.

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.ru/wix?keyword=pride+prejudice+and+zombies+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/067ecb_43036e255e154be0aa87466ae26aef22.pdf
    • https://static.usrfiles.com/ugd/857e61_bb0db953ade9480593542f48e50ad88a.pdf
    • https://static.usrfiles.com/ugd/191a6d_f33f0b3d4b1f4dd5b221a5505d8aed6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e56b2ce15c044e99ac8fe15d1b72301.pdf
    • https://static.usrfiles.com/ugd/b8c837_2118bb7747e146ccbc5113a3c7f1e372.pdf
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/biodata_format_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/96073548743.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/risk_management_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/mobonuximanukegubuvopevav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/minecraft_3d_texture_pack.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d928d30a28b4f8c87529791b03cfff4.pdf
    • https://static.usrfiles.com/ugd/b8c837_794bed3fc8df4cb7b94b22a5916b1580.pdf
    • https://static.usrfiles.com/ugd/fbccce_df5580f91cf5487486e147103108d8e3.pdf
    • https://static.usrfiles.com/ugd/314c35_ae9f62755eaa43d59ac768beaddaa67d.pdf
    • https://static.usrfiles.com/ugd/253000_8f8967792c98440ebd84931acc5b552d.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_off00007b5c.bin
fad6a3b04d2100d2a641b128a2fd4bb211919e7729d87ceedfc6b4196440c821
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 5584 bytes
font_01_sfnt_off00008e41.bin
d65cfdb4a731df1663b44ea7d22c0be1a67fb88cfefcd4642e9d67cef162fb39
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E41 10260 bytes