Malicious PDF — malware analysis report

Static analysis result for SHA-256 598ce57872d59ca6…

MALICIOUS

PDF

35.9 KB Created: 2020-08-05 22:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeac1e3665ab464b340078d5eaade645 SHA-1: 3a18731004c63065f21a89ec991c6d4cc0bff74a SHA-256: 598ce57872d59ca6288fdb8e17952ac80cf456e366df9f717747af4984f8a261
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=appalachian+state+university+campus+map+pdf'. This URL is embedded within the document body, suggesting a social engineering lure to trick users into clicking it. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm designed to distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=appalachian+state+university+campus+map+pdf
    • http://files.empathsandlightbeings.com/uploads/1/3/1/4/131438260/6404035.pdf
    • http://files.commentingtogether.com/uploads/1/3/0/7/130740392/xijimusiz.pdf
    • http://files.unpavedpennsylvania.com/uploads/1/3/1/3/131383575/3d284719bc62d0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/after_effects_classroom_in_a_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/2924/0727/files/dusubamixapowejuze.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/zadoduju.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9365/files/15963170403.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0295/files/famogabexejebalup.pdf
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/ditoda.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/43216855953.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/xalofitefefepigomusimoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8455/4141/files/bioshock_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7495/files/70389274975.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_off00004d0a.bin
548914b218c2d0f6c027b4d754d3f1068fb9140515c956303c859ce16c7c66d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0A 5548 bytes
font_01_sfnt_off00005fc6.bin
d9295148c5c7191cbfbe6f0935aaac041c86a328ef0e58d44c66298ca5950693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC6 10268 bytes

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