Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c38a68b28044ff…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 17:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23dcb95e49cd828e547408fc53e758fe SHA-1: aaca11d1ec2b756390a84fe9a952b43aeb359caf SHA-256: 08c38a68b28044ffee89a6b131dd4df4496870ecce245880599438886692285a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to external PDFs, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicates malicious intent.

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.ru/wix?keyword=how+old+is+bunny+brawler
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_af10a04a980c4568ba22dc6c15a8475b.pdf
    • https://static.usrfiles.com/ugd/77d535_1832450fe4e848b6bf1bf605befb0c1d.pdf
    • https://static.usrfiles.com/ugd/6cf392_2bca818526154b75b03db75f8b8df923.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/dejokem.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8c547cbf4ad45df9bf4e94c2775807b.pdf
    • https://static.usrfiles.com/ugd/4d6844_967478e0a1b942059c30fd2e7608c2c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f38d507272ba4bb5ac3f24534b1883b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a77fbba861a436f9ccbe225fd91bce4.pdf
    • https://static.usrfiles.com/ugd/b8c837_036edfe4fecf43169e19388be727cec1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5559a00b0338438dad84c894ac8dbfb9.pdf
    • https://static.usrfiles.com/ugd/b8c837_19d6b2351b174b71a02d7582669cccff.pdf
    • https://static.usrfiles.com/ugd/d4da64_7d62fd9f4a1743328aff3f9e5fb02de2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ebe.bin
2f462d788c390f4d65acb80f4dd9dd20c1244cc765bd265028ecbf27b06cd170
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBE 4916 bytes
font_01_sfnt_off00005f83.bin
90629bd9e9532c291d2e521a07adb40660eb4551f91190f8a82285f99e114514
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 11640 bytes
font_02_sfnt_off000085e7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E7 4324 bytes