Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9491151fa3be922…

MALICIOUS

PDF

47.6 KB Created: 2020-08-19 19:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 754aeaebd4e46d5119517f1c8e31e542 SHA-1: 0667b104c4c4738c768819ff4981bdeaa46565e3 SHA-256: b9491151fa3be92298f4b46b3728a2f455f551b5b2ea6eb3db455a44e4bd7ac4
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate worksheets, but the primary link redirects to a known malicious domain. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's purpose is to lure users to malicious infrastructure. The embedded URLs are part of this redirection scheme.

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=evaluating+logarithms+worksheet+with+answers+pdf
    • http://files.ellendonaldson.com/uploads/1/3/1/8/131856146/tetoj.pdf
    • http://filexiwin.sdsuzukiinstitute.com/uploads/1/3/1/3/131383483/d61d9cb999.pdf
    • http://files.heartlightcharlotte.org/uploads/1/3/0/7/130776167/9332443.pdf
    • http://files.keeperswesternstore.com/uploads/1/3/1/4/131438059/redezofoluredaji.pdf
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/topisetoxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/60597662643.pdf
    • https://cdn.shopify.com/s/files/1/0432/7361/7568/files/restaurant_inventory_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/pipette_calibration_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0990/files/gafawijilakofajoga.pdf
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/bibubegivelidimejijax.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2312/files/kijoku.pdf
    • https://cdn.shopify.com/s/files/1/0435/4143/0440/files/kabokamanaromogufowite.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0876/files/xugimaditonozofixesusan.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/35527027630.pdf
    • https://cdn.shopify.com/s/files/1/0433/6340/1877/files/salesforce_developer_tutorial.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_off00006bf8.bin
e2f0a271edf8a23680d4dc61c855559fe8c566d2acc0e22c7c3177e68efc155f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 5512 bytes
font_01_sfnt_off00007e9a.bin
e324aebe62f72e3b460c55a918b4de47955a5b1b3189f92fe91a4e621ac4e05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9A 10664 bytes
font_02_sfnt_off0000a312.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA312 4324 bytes

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