Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b23c137267bdce…

MALICIOUS

PDF

58.4 KB Created: 2020-08-04 15:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 871254bc990fc12359cd1d549edb1a3b SHA-1: f0d88a76d7d5363cd8a0a3a59da9e4f3824675db SHA-256: 41b23c137267bdcee9a57eb191a273993a524f92189308e2949e48af93ec90fd
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary URL, https://ttraff.ru/pify?keyword=effective+business+communication+notes+pdf, is likely used to direct users to malicious content. The document body itself is heavily obfuscated and contains many of the same links found in the heuristics, reinforcing the malicious intent. The presence of a large number of links suggests an attempt at SEO poisoning or a broad phishing campaign.

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.ru/pify?keyword=effective+business+communication+notes+pdf
    • http://files.exmouthcaninecentre.co.uk/uploads/1/3/0/8/130874128/jenasaj.pdf
    • http://files.labelletraining.com/uploads/1/3/1/6/131606687/4282139.pdf
    • http://files.tdays.org/uploads/1/3/1/6/131637016/7e2fa7776593e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/nukowesezebejav.pdf
    • https://cdn.shopify.com/s/files/1/0429/9227/1519/files/dusewulubap.pdf
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/dadevajinopidaboza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/65517323808.pdf
    • https://cdn.shopify.com/s/files/1/0432/8230/1094/files/95005822428.pdf
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/86999204918.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/denozogezegapogepoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/lererinikisabujufozubi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/66945399015.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/1945803389.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_off0000a742.bin
21eacad3ce6357a040d67f5e01b4c1e23828ccc40ff487c5063c601caf2cf4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA742 5328 bytes
font_01_sfnt_off0000b95c.bin
4b177ad5b2023a768dd384f5669f4cfe4fd75dd10408c5cdc3d8e0476f6380d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB95C 10404 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.