Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b65dddb38328d6c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-30 20:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d37b1a379b9254abcd97dd41944cf5cb SHA-1: f4e7ef35d7f59e991799051fb95b330469538479 SHA-256: 5b65dddb38328d6c59ce5a3f3802e48499005fb2b877f043e59c38f2faf36aba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is also present in the document body. The file also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF documents, suggesting an attempt to manipulate search engine results or drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=ogre+battle+64+class+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_f2933df0f45a4e1c93f0ae2af8fecf26.pdf
    • https://static.usrfiles.com/ugd/b85eb0_125e4fadb6b649fe94d2acfa6fe12ae9.pdf
    • https://static.usrfiles.com/ugd/83f04e_e460ab482cca48e3bfe3d5cd83bca49d.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ea909af08f64bdaa4c5220f14457c2e.pdf
    • https://static.usrfiles.com/ugd/89064d_e5217a41c708412daf97e55049d39435.pdf
    • https://static.usrfiles.com/ugd/5360f8_f4450eca0eba49349460c40c2ff39e26.pdf
    • https://static.usrfiles.com/ugd/c836c3_dc9589ecd46e414bb4522b065ab46a82.pdf
    • https://cdn.shopify.com/s/files/1/0463/2389/2381/files/kuzawedobakuwam.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5799/files/islamic_capital_markets.pdf
    • https://cdn.shopify.com/s/files/1/0435/6177/9359/files/butterfly_on_a_wheel_movie_free.pdf
    • https://static.usrfiles.com/ugd/d1c05f_91e2b711a58149418523d2212ae8b663.pdf
    • https://static.usrfiles.com/ugd/b8c837_d444418520d14a84a5d78672c35875bc.pdf
    • https://static.usrfiles.com/ugd/a86d68_c62d33fe05e745f3b5d13eccb7f64c32.pdf
    • https://static.usrfiles.com/ugd/8127dd_ca141b1a706447f2a4ad985d374996ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_72047fc3f4ea457f8ebb4da76410827a.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_off0000696e.bin
b995e078b01cbe6b0d0d0fc73b6d22ab3148b0af6a666af0ab8a159a4f4c45fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x696E 5516 bytes
font_01_sfnt_off00007c37.bin
46929e8e91ce0041d1fd33995deecb8ccaf65ff20e529eb6a33829cb7ac72421
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 10212 bytes