Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe2547564849798…

MALICIOUS

PDF

34.3 KB Created: 2020-10-11 04:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b81ef8ca20cac2eb75690ae0164eb84b SHA-1: ad7629019ae059ae9355bd7921bc8980704ab4ae SHA-256: 1fe2547564849798401563d02662fcfa7f54768e5d078cb19ca97e45a6d60427
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, disguised as a school supply list. The ML classifier strongly indicated maliciousness. The primary malicious IOC is the redirector URL which is designed to lure users to malicious content.

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://gettraff.ru/pify?keyword=st+joseph+school+district+school+supply+list
    • http://files.nanba-ryu.com/uploads/1/3/1/1/131163854/2209352.pdf
    • http://tofemire.austinmichaelgage.com/uploads/1/3/1/4/131406925/vavupon-geriwu-tebakale.pdf
    • http://razaxerol.arco-vienna.at/uploads/1/3/0/7/130775476/083a1673941998.pdf
    • https://site-1042922.mozfiles.com/files/1042922/kivumekufexulanoziz.pdf
    • https://site-1039417.mozfiles.com/files/1039417/rovavaminifipu.pdf
    • https://uploads.strikinglycdn.com/files/66b3a969-e0e3-4b11-92b5-f1c5ab649d95/tigefi.pdf
    • https://uploads.strikinglycdn.com/files/d4897cfb-136e-4128-9b72-ef853e6f660b/28940175257.pdf
    • https://uploads.strikinglycdn.com/files/7696ad63-0aab-4979-9111-eaaf25472fb9/kajufanon.pdf
    • https://uploads.strikinglycdn.com/files/4ae1c24c-ef48-4246-ba4f-d9c4f2878704/pimefemivulubolo.pdf
    • https://uploads.strikinglycdn.com/files/10598ad5-0b83-47dd-afc7-59e4f6bb5193/tenonalem.pdf
    • https://uploads.strikinglycdn.com/files/d58ad0f4-a08a-4f17-b800-76272642901a/jovibaxagokagajemumegaxi.pdf
    • https://uploads.strikinglycdn.com/files/c1535430-5ea7-4d42-b281-c41017205ad0/89147432635.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_off0000476c.bin
3e584efa4eec14e0d5d68249a9fef5b514f781bda1f97de8065cace5ec0d62cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x476C 5232 bytes
font_01_sfnt_off0000593e.bin
5929cf341e9b3d886bbea58616fae3aaa64a99aad3e03b120e38289fbcef46c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593E 10296 bytes

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