Malicious PDF — malware analysis report

Static analysis result for SHA-256 7238b1319837e441…

MALICIOUS

PDF

39.0 KB Created: 2020-08-13 09:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37d56a7da74bdac075c86f89c11ac849 SHA-1: 339bb67c6966aa8c0e9ef40610ca2fec0a0916c3 SHA-256: 7238b1319837e441eac3d5510c097a88d3b61be4bedafa6b9d41ddc9f861dc51
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.com', suggesting a phishing or scam campaign. The document body and embedded links are designed to lure the user into clicking on malicious or deceptive content. The presence of multiple PDF links indicates a link farm strategy, likely to distribute malicious content or improve SEO for scam sites.

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.com/wb?keyword=prueba%20de%20la%20catalasa%20pdf
    • http://files.doggydilemmas.co/uploads/1/3/1/3/131383771/510bbb9890.pdf
    • http://files.marcwortmanbooks.com/uploads/1/3/1/4/131407089/d0e29dc6c78.pdf
    • http://files.appletreecontractors.com/uploads/1/3/1/6/131607712/9709263.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/tadulibo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/lemigenu.pdf
    • https://cdn.shopify.com/s/files/1/0441/4459/1000/files/dusananejo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/46582366806.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/98165731327.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/notifefow.pdf
    • https://cdn.shopify.com/s/files/1/0435/9972/4702/files/miragifus.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/principios_da_administrao_financeira_livro.pdf
    • https://cdn.shopify.com/s/files/1/0450/8601/5640/files/alchemy_rory_sutherland.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_off00005848.bin
39b98b6526c9975c51065e3ab953c6f8deecc988e5699d58ddfb21aaf4e00533
pdf-font-stream PDF embedded font (sfnt) at offset 0x5848 5288 bytes
font_01_sfnt_off00006a41.bin
30b4ede5bff8020b5325d4b6c025571640d8f769ea96f9aa37d0f9887d2921d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A41 10992 bytes