Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb38ff8f8337082…

MALICIOUS

PDF

38.1 KB Created: 2020-08-11 04:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7234b73198c2ddb0942c3bbfca5b682a SHA-1: 3b80626ea643dc2e3740d93a49cbc4f7ef9a6b11 SHA-256: fdb38ff8f83370824ade03f90316bcb5344299fee5e6f1e64ef9409c6d7cdd75
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with many embedded URLs pointing to various PDF files, likely to obscure the malicious destination. The primary malicious URL identified is https://ttraff.com/pify?keyword=scrambled+sentences+sight+words+pdf, which is likely used to redirect the user to a malicious site.

Heuristics 3

  • 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.
  • 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/pify?keyword=scrambled+sentences+sight+words+pdf
    • http://files.dollartank.net/uploads/1/3/1/6/131637257/xofekudixixedoruj.pdf
    • http://files.vibrantlife101.com/uploads/1/3/1/4/131437044/22cb2e3ef0a7a5f.pdf
    • http://files.everaftercharacter.co/uploads/1/3/1/3/131379540/jixivod.pdf
    • http://files.lisadeakins.com/uploads/1/3/1/3/131398094/vusuza-dazumizeteje-sufoko.pdf
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/guardian_ranks_bl3.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/civilization_6_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdf
    • https://cdn.shopify.com/s/files/1/0439/7246/0702/files/molecular_biology_experiments.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/29867329467.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/refok.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/bumedopanaguzurefebibu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/gonegofatijefilesugiwoni.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/cation_and_anion_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/jotadetu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/belanasa.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005549.bin
37177695737df63dbf28aa8e6126d7e5b0d267f9a928f92ecd45fbce8f8a365f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5549 5904 bytes
font_01_sfnt_off00006937.bin
cb5e7428a8184cb183123469fd886395c7737b0aa5208fd965dc2314260fab5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 10016 bytes

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