Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa11468851053b7…

MALICIOUS

PDF

39.2 KB Created: 2020-08-27 17:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e43c263937581cb273b589aa2bfa3d3 SHA-1: 43b1d97a9cc007ea208c0a32add5fc9418effdbb SHA-256: 6fa11468851053b787b27033053b2b8fddc6ce1617eeb0ba69fa72b04c4d2601
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, includes the URL 'https://ttraff.cc/pify?keyword=brooklyn+dodgers+logo+font', suggesting a lure to a malicious site. The presence of a large number of external PDF links also indicates a potential link farm or SEO manipulation tactic, likely to distribute further malicious content or host phishing pages.

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/pify?keyword=brooklyn+dodgers+logo+font
    • http://files.seenergy-timber.com/uploads/1/3/1/4/131438127/bukejiti_wikup.pdf
    • http://files.venta-oprema.com/uploads/1/3/1/4/131452958/nodovivaj.pdf
    • http://zakabox.extratimeconcierge.com/uploads/1/3/0/7/130775565/fc095a32a7.pdf
    • http://lupaziwo.clarityamrein.com/uploads/1/3/0/7/130775451/a20f5fd4ce8b37e.pdf
    • http://files.counsellingpsychologist.services/uploads/1/3/0/9/130969555/7582248.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/89701346601.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2062/files/54604366456.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/54677168950.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/7921191814.pdf
    • https://cdn.shopify.com/s/files/1/0432/3442/7047/files/kdwin_armenian_keyboard.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7850/files/66289300150.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/27294696939.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_off00005bc2.bin
191228262b6bddd9cbc21d9a2441d1aa2dbf6478e3da033727e027215b904b14
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BC2 5080 bytes
font_01_sfnt_off00006d2e.bin
e181e966bd1e172dafb64b2b9472331a59d0e9dba3d3acf70c1e3a52898e10ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2E 10364 bytes