Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4d9e47c4371f4d…

MALICIOUS

PDF

43.5 KB Created: 2020-08-21 09:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: edf4b3c70d178034b7d1268e4dcafc2e SHA-1: f3ea7db059286afcad818062ec09f098d8b0a52b SHA-256: 7d4d9e47c4371f4def24d386ec704590175216709881900d773349446bb19b0b
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector. The document body also contains the URL for this redirector, suggesting an attempt to trick users into visiting malicious content. The presence of multiple PDF links, some benign and some unknown, indicates a link farm strategy, likely for SEO manipulation or to host further malicious content.

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/pify?keyword=bigo+live+app+store
    • http://folupe.bayareamuslimtherapists.org/uploads/1/3/1/3/131379163/1096155.pdf
    • http://files.mrspoolsbearcatclasses.com/uploads/1/3/0/8/130814531/2235454.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8717/5588/files/bhairava_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3152/7577/files/40005811210.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/41559526379.pdf
    • https://cdn.shopify.com/s/files/1/0435/4211/8555/files/wow_classic_hunter_macros.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/togopiwatazemokatoketiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2867/files/bse_odisha_6th_class_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/2240/7064/files/guturopuzojalexijamuvedim.pdf
    • https://cdn.shopify.com/s/files/1/0430/5901/9933/files/56522475316.pdf
    • https://cdn.shopify.com/s/files/1/0436/1682/9603/files/vabew.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_off00006bb7.bin
b29fe8c423cbb5cdec851db07490eadb4985f178f764cef974cd08f321abefef
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB7 5096 bytes
font_01_sfnt_off00007d22.bin
61e6657f7fc68eedfb97760b978437c10b997864b880340ad13e42959845c711
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D22 10840 bytes