Malicious PDF — malware analysis report

Static analysis result for SHA-256 1094e876812e9e29…

MALICIOUS

PDF

54.7 KB Created: 2020-09-01 02:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e609c14ee35de1b8b71502ac725eb240 SHA-1: d53bc2673e7b24c2a8df0030156e558ba36d9b70 SHA-256: 1094e876812e9e290bf9023d9e5f9442525b558aba55737d52cf35e906d54657
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, one of which, https://ttraff.ru/wix?keyword=les+blagues+du+jour+pdf, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to drive traffic to malicious or phishing sites. Although no scripts were explicitly extracted, the PDF structure itself facilitates the redirection.

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=les+blagues+du+jour+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8039/2609/files/fikijurotisowunazot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/62536733484.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soreluseloxajakikolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8210/5511/files/26899136195.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/68682267489.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/nijanif.pdf
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/d_d_descent_into_avernus.pdf
    • https://static.usrfiles.com/ugd/b8c837_1036b049c496476fa302a3d9a69dcf2a.pdf
    • https://static.usrfiles.com/ugd/ab0441_cfedc80636504ddebdd5e5499c66ffcb.pdf
    • https://static.usrfiles.com/ugd/cfa91a_25cdd1e772644156aa244abc7312753e.pdf
    • https://static.usrfiles.com/ugd/3649d2_e345fde3bc074d7d982280b6af9e747d.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeb5fbc71b5f41eba42156967372d0cf.pdf
    • https://static.usrfiles.com/ugd/b56239_d91bb08173374958aceb41a71beb1d50.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000864e.bin
0dcf691e67582745b268d6de5e2f0a6a2f487c17be0b267850cb4761ef00bd02
pdf-font-stream PDF embedded font (sfnt) at offset 0x864E 5016 bytes
font_01_sfnt_off00009773.bin
12b386465e437af7a5011f9fef51031c67eab64303a3a33c4c61f9454a4a65c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9773 13220 bytes
font_02_sfnt_off0000bfc3.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC3 4324 bytes