Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f233e8106db36c…

MALICIOUS

PDF

88.4 KB Created: 2020-08-16 10:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 866b08fa9f20c6ae98e18e8e47bf1f3a SHA-1: 0411cb3c225b0805c6c7cb43d8fde5e3b1b81e31 SHA-256: b9f233e8106db36c9f0239e5406ccc9d6bff1fc8494382c21632edb5fa4dea48
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 identifying it as a link farm. One of the primary links, 'https://ttraff.com/pify?keyword=treatment+guidelines+for+strep+pharyngitis', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, suggesting the document's purpose is to lure users to this malicious site. The presence of a link farm indicates a broad distribution attempt, likely for phishing or malware delivery.

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=treatment+guidelines+for+strep+pharyngitis
    • http://jazonurol.makeityoursbyalex.com/uploads/1/3/1/4/131483083/3935576.pdf
    • http://files.sweetsugababy.com/uploads/1/3/1/4/131438113/zatasitanar.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/lubikevogotuzeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/104_ceramic_capacitor_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6451/6005/files/45004249206.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/nenasejuloxavatanupopid.pdf
    • https://cdn.shopify.com/s/files/1/0438/8877/1227/files/56594851958.pdf
    • https://cdn.shopify.com/s/files/1/0429/8299/8170/files/15511742742.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/kindled_orchid_curated_roll.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/karimi_aflatoxin.pdf
    • https://cdn.shopify.com/s/files/1/0448/1345/1430/files/data_warehouse_toolkit_3rd_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/gubekavawuvuzadutum.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_off00011d52.bin
e4228a05d6bc3e65b6257a12a25e1b2f9d43e8bdbf039bba1b2d5ce96ebc0eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D52 5504 bytes
font_01_sfnt_off00012fe7.bin
d4b20f98a99c5209e00102a8cb8420481b464320aaf627f693d9f0b51830b934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE7 10660 bytes

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