Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad892c295f002c5…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 08:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 906889cb553058c3992ca312f99b3238 SHA-1: 406aad1e54614488bdd3027b064fb7c9d7ffead8 SHA-256: 0ad892c295f002c51a2626be2bd134105d009ca79cc2a4ab33ee7337be36828b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. One of these links, 'https://ttraff.com/wix?keyword=breville+smart+grinder+review', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be heavily obfuscated or corrupted, but the presence of the malicious redirector URL and the link farm heuristic strongly suggest an attempt to lure users to malicious content.

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=breville+smart+grinder+review
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b11f6d_c82adc24ae874539a6a330eababf6aca.pdf
    • https://static.usrfiles.com/ugd/b8c837_527e1dd520674f53a0cf9c4579a140c3.pdf
    • https://static.usrfiles.com/ugd/afe78f_04435354b6b7493eac94297b33b10383.pdf
    • https://static.usrfiles.com/ugd/0aab01_065cb43e7fda4ed69db0146bd59de949.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0df0ede68d24257857ef5e4911b38e9.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/google_calendar_embed.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6621/files/beyond_the_mask_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0447/9270/9271/files/xufodiguluvosubagojivuvan.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e1aa1f06bcf4ed6b8c94da83f48776a.pdf
    • https://static.usrfiles.com/ugd/b8c837_8731ca8a8b6c45afb1c21e8d644fb998.pdf
    • https://static.usrfiles.com/ugd/289c5e_7a6b4a5204414fcf8097ce847feb89a8.pdf
    • https://static.usrfiles.com/ugd/6290de_18184bbd7738479c9287c3978e388033.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_off00006939.bin
7fbb39f6b3e9a45d4864d1f34a458bed882847100c5c46379b22091dd4b58ab3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 5344 bytes
font_01_sfnt_off00007b66.bin
c6dc1d9f70513664dbaaad40627eb408540a5b9581d93875cd052e91720e903f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B66 10492 bytes