Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bef10c03345345b…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 18:31:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99f0a296b97ba99eab7fd5201fb73e0d SHA-1: 70d70150742430f5e696e3232d358c717c4378fb SHA-256: 3bef10c03345345b9da5f742407eb22e68fd6ffd194e25d023d4e2e40bc3279c
150 Risk Score

Malware Insights

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

The PDF document contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests the document's purpose is to lure users to click the link, likely leading to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=definition+of+literature+review+by+famous+authors+pdf
    • http://files.odchs.com/uploads/1/3/1/4/131483391/cffb81840b6.pdf
    • http://files.ropepumps.org/uploads/1/3/1/4/131437657/fosidafixenaredav.pdf
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdf
    • http://files.szymczakgroup.com/uploads/1/3/1/4/131453221/pisunufuliviguveloxe.pdf
    • http://files.linebackerproperties.com/uploads/1/3/0/7/130774964/7744192.pdf
    • http://files.ropepumps.org/uploads/1/3/1/4/131437657/fosidafixena
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/12696219695.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/7_team_single_elimination_bracket.pdf
    • https://cdn.shopify.com/s/files/1/0432/9573/5976/files/loop_antenna_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/mesarudepigeferitugiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6245/files/20498917329.pdf
    • https://cdn.shopify.com/s/files/1/0433/0124/0985/files/32187785987.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/280680.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/53196714677.pdf
    • https://cdn.shopify.com/s/files/1/0432/2449/8343/files/tim_robbins_martin_lawrence.pdf
    • https://cdn.shopify.com/s/files/1/0432/4504/3880/files/26904301314.pdf
    • https://cdn.shopify.com/s/files/1/0428/2325/4179/files/bosch_steam_boiler.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_off00006c4e.bin
71b3edd65068429684d2bec5f088b492970e7b7947108b9f467838457b14f1db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4E 5672 bytes
font_01_sfnt_off00007f87.bin
fcb29937203bf6ad29c3add4bc4dbd0015fa80080a1cd1e5a329e9ea993b0522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F87 10052 bytes

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