Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc7eb036f7c904c…

MALICIOUS

PDF

43.6 KB Created: 2020-09-06 03:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59629354c4ac37bb68472827877bd316 SHA-1: 10a683f7756b90120047e62979de89af98cbe714 SHA-256: 5cc7eb036f7c904ca31bb3f80ef5ba45e64bb208ad8e65dc706a061857c4baf6
154 Risk Score

Malware Insights

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

The PDF contains a link to a suspicious domain, identified as a malicious redirector. It also features a large number of external links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains the primary malicious URL and references to other PDFs, reinforcing the 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.club/wix?keyword=the+ultimate+guide+octopus+cuttlefish+camouflage
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/neledebutuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/kilkea_castle_golf_course_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/84114569282.pdf
    • https://cdn.shopify.com/s/files/1/0445/5759/8884/files/ccsp_official_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/kixubodudirabusukuzeviwe.pdf
    • https://static.usrfiles.com/ugd/8d0191_d10b55b460a6455b8b7c5cc5b4d32257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3755/files/penudinuratewobanotirusep.pdf
    • https://cdn.shopify.com/s/files/1/0462/5052/4823/files/google_apps_script_spreadsheet.pdf
    • https://static.usrfiles.com/ugd/90c678_6359693667d244fc9c593ebdb78bd40e.pdf
    • https://static.usrfiles.com/ugd/7c30af_8ad63c3d4e9e42ea849e2d2b66d6d3a7.pdf
    • https://static.usrfiles.com/ugd/accd1f_1b54082ad5ce4d9599008ff805e6edd3.pdf
    • https://static.usrfiles.com/ugd/d954c5_074b191007d944a0a6a44fdda4c91f7c.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_off00006b9b.bin
3a588fa552cb7cdb9a1bc11fd870298709def4fc6c038b5590684812b7e47b00
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9B 5424 bytes
font_01_sfnt_off00007de8.bin
6a1dda5b8bfbf7465d223563fedd44c5bffe5eb9959726724a8faa7a785304a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE8 10500 bytes