Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bb5311f2a627207…

MALICIOUS

PDF

81.8 KB Created: 2020-08-04 15:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 782ba03d839921aa2913712b59aebcc0 SHA-1: 5d607ecad3df479f49dcdb2d16e029db295027b0 SHA-256: 4bb5311f2a62720767669b994d79349360530475dd5e9a4fc7c3e108f0fabcdc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=brazing+equipment+pdf'. This indicates a phishing or social engineering attempt to direct the user to malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content or to obscure the true destination. No scripts were extracted from this sample.

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.cc/pify?keyword=brazing+equipment+pdf
    • http://files.softidolatry.com/uploads/1/3/1/4/131453348/gowofoduwisisit.pdf
    • http://files.donwalkeraudio.com/uploads/1/3/1/1/131164159/zakorixofobo_mabisij.pdf
    • http://files.sharibatheactor.com/uploads/1/3/1/6/131607467/924e952baca.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/fasafizelanuvukufiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/7792/5019/files/kiximofeviveruz.pdf
    • https://cdn.shopify.com/s/files/1/0429/4744/4903/files/26379977072.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/tojivadifasawukubiterudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/nekozususawuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1289/files/compressed_air_brake_system.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4702/files/golden_spoon_nutritional.pdf
    • https://cdn.shopify.com/s/files/1/0438/2477/5330/files/datajeninarajidunip.pdf
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/electronically_sign_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/lowegufotosijotaxezori.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/wekutopibonaduxadowovikag.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f723.bin
8f8328df7931b047dbe89fef4cfa73d8d19179e82bb23aa64907419d2e86a094		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF723 5148 bytes
font_01_sfnt_off00010888.bin
502c5e9bdaf5a7a8db063784face28791084566d7a4c878898a1bd08619fd828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10888 10404 bytes
font_02_sfnt_off00012c1d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1D 4324 bytes

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