Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd82fe6ea2170d32…

MALICIOUS

PDF

44.0 KB Created: 2020-07-10 03:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90a01aa6fbd61d8aba2ad6ed7aeeb96e SHA-1: 94f2972944c7c299a2520d5d9d7782a8298c6157 SHA-256: dd82fe6ea2170d32bda3c3fdedccd8c7dd43fb8ffb6cff19bfea43bffcb9b177
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.com', which is used to lure users with search-term-based keywords. The document body also contains the same search term, reinforcing the lure. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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/wb?keyword=pdf%20ocr%20open%20source%20windows
    • http://files.wfshootout.com/uploads/1/3/1/3/131383823/majajojamobu-ligunazijefa-marapotu.pdf
    • http://files.elexadawson.com/uploads/1/3/0/7/130739328/bosev.pdf
    • http://files.sarahann-photography.com/uploads/1/3/1/8/131857847/gelogajaputal.pdf
    • http://files.trustandbelievefoundation.com/uploads/1/3/0/8/130874213/lisotikudosopi_wumolopoxexux_mamadaverigifa.pdf
    • http://files.statebirdtogo.com/uploads/1/3/2/7/132710687/a1b067.pdf
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdf
    • http://files.waltpadgett.com/uploads/1/3/2/3/132302998/c8a4c389ad.pdf
    • http://files.brushandbranch.co/uploads/1/3/0/7/130740344/2297158.pdf
    • http://files.artworkskenosha.net/uploads/1/3/1/1/131163740/55059f11c.pdf
    • http://files.streetambitionunited.com/uploads/1/3/1/3/131379115/jivemalegotojazuja.pdf
    • http://files.allroneofus.com/uploads/1/3/1/4/131406379/6c5280aa338e9b0.pdf
    • https://mixanutiliba590569985.files.wordpress.com/2020/06/savobe.pdf
    • https://bamidepe.files.wordpress.com/2020/06/62832458221.pdf
    • https://vobadir.files.wordpress.com/2020/07/13784392368.pdf
    • https://ritagivizat.files.wordpress.com/2020/07/revimedesedeferaroxof.pdf
    • https://vaxunijigi.files.wordpress.com/2020/06/norubisujimimoguto.pdf
    • https://garuwade.files.wordpress.com/2020/06/48625317301.pdf
    • https://zelobakisalo511930088.files.wordpress.com/2020/07/58142724599.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26433336276.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zaduvezumutup.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_off00006fe1.bin
9873bb66cc06ce646fc0cc4f204e9c811f99d911e6b0988bb88c71bd3f7513c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE1 4800 bytes
font_01_sfnt_off0000804a.bin
176991c2272e828e41a19422a23513f12f8e58f2d81fd9d2dcf96b4a70584002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 10088 bytes

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