Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dee2fdd85e9e511…

MALICIOUS

PDF

108.9 KB Created: 2020-08-30 05:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66d29e57b07221fc41e7fe690dd72e24 SHA-1: 0055df583c8802e55581d3d188168c8a885a221d SHA-256: 5dee2fdd85e9e5112cea38a933c032c0199829d6a056cb45950ee83a4940b509
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the URL and a keyword suggesting a lure related to Albert Einstein. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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.cc/wix?keyword=autobiografia+corta+de+albert+einste
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4999/8743/files/11386712965.pdf
    • https://cdn.shopify.com/s/files/1/0448/1289/4374/files/pixuwepigi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7616/4515/files/makinuwusadixejesusemol.pdf
    • https://static.usrfiles.com/ugd/b8c837_5109253166b049b291c4531faa663632.pdf
    • https://static.usrfiles.com/ugd/eb6612_9dbbadfee8eb4b76bf700f0f7d8f43a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_2df26a97b4c64eae930d8ae76ac9163c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e41db60785a940b79d36a42069d4c010.pdf
    • https://static.usrfiles.com/ugd/f84671_dcbd7d5ed4d04bc1952a37aacfe1b547.pdf
    • https://static.usrfiles.com/ugd/b8c837_778064ffdee04353abbbbfaab9dbc789.pdf
    • https://static.usrfiles.com/ugd/b8c837_f52ec25b35d0407d8f27524e9b91a89d.pdf
    • https://static.usrfiles.com/ugd/b8c837_685f764df56043f5906e98e4183beb37.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_off00015e19.bin
3e62363a2d7ee10b659842df9832395921740af5b748382910ce756b393da653
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E19 5316 bytes
font_01_sfnt_off00017034.bin
cdc45a153d8aa3f322cd141a829f2be02b969631d4277e3864afe1cd3b2503e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17034 17380 bytes