Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbdb974cbd53c5bb…

MALICIOUS

PDF

49.2 KB Created: 2020-08-30 01:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19141d0e1ea42cb066d295012b530a2b SHA-1: 0409332d39ddd7c3aa584c9a24eb9790cf9ff379 SHA-256: dbdb974cbd53c5bbfade699eb8d4d4fbb2258bd71dd628c90fdb441868db1f04
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by an ML classifier and contains a significant number of embedded links, many pointing to external PDF files. One of these links, https://ttraff.me/wix?keyword=the+absite+review+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, appears to contain references to this URL and other PDF links, suggesting a link farm or redirection scheme. No scripts were extracted, but the overall structure and identified malicious URL point towards a content-driven attack.

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.me/wix?keyword=the+absite+review+pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/51356624887.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1415/files/ginegivotejujabete.pdf
    • https://cdn.shopify.com/s/files/1/0434/6609/6802/files/climbing_boots_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9571/files/potebi.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f3a30c779d64caa82f7c8d520bb5d73.pdf
    • https://static.usrfiles.com/ugd/b8c837_139045fa44014a24ac06e59f8c364058.pdf
    • https://static.usrfiles.com/ugd/b8c837_e340b4e0341b4c08a2f918c0e687e228.pdf
    • https://static.usrfiles.com/ugd/5bb01c_188f358aecb848a3847d01b07eb49487.pdf
    • https://static.usrfiles.com/ugd/b8c837_da332fba4c2d416aa22f94bcbf61e122.pdf
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/vopisila.pdf
    • https://cdn.shopify.com/s/files/1/0434/3716/2657/files/40057617070.pdf
    • https://cdn.shopify.com/s/files/1/0454/4033/6030/files/customer_account_details_form_template.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b0a.bin
bfc29f7de0c2f71e9cdba4a23134907e49cfc9a90fc3d9d85191f27a7668363d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0A 3008 bytes
font_01_sfnt_off000075ba.bin
ba1d688a970db3ec9f8d3f0cad4a939b4b73ab910b793ca0a3a9736a877e19a3
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 5340 bytes
font_02_sfnt_off000087f0.bin
6a3b8b38b7ab5c1f3213d868181b661f88d511160d4622832e1103442fbf526c
pdf-font-stream PDF embedded font (sfnt) at offset 0x87F0 15500 bytes