Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ee3f42fb3710aa…

MALICIOUS

PDF

38.3 KB Created: 2020-08-07 04:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b266ed0dc37f8257c62be91304d8b9a SHA-1: 2a54a1d11efede46bf3f96ed8a18421c8da7f3a0 SHA-256: 39ee3f42fb3710aa5864bde9b8d5d4a691a8e81a6983e17ed86f71f1b4cb1483
150 Risk Score

Malware Insights

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

The PDF document contains a deceptive lure, presenting itself as a 'solution book' to entice users to click a link. This link, https://ttraff.com/pify?keyword=solution+book+of+thomas+calculus+12th+edition+pdf, redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document also features a large number of external PDF links, characteristic of a link farm, further supporting the malicious intent.

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=solution+book+of+thomas+calculus+12th+edition+pdf
    • http://files.ebbtidewellness.com/uploads/1/3/1/1/131163914/gigabemotewadob.pdf
    • http://files.tavernegoudenpunt.be/uploads/1/3/1/3/131379540/tenopilopeda.pdf
    • http://files.summerslamhockey.com/uploads/1/3/1/4/131437335/ff1b6c.pdf
    • http://files.hammerheaddfs.com/uploads/1/3/1/4/131437376/vavopoxuze.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/73873516227.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/78085119517.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/dofuxi.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/51419802033.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/wezulazobuxelanamaso.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/75210289302.pdf
    • https://cdn.shopify.com/s/files/1/0433/7824/5781/files/welifitukula.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/bidunedutexaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/2696/4895/files/bucs_2020_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/fonitijikipaletikuk.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_off00005648.bin
1be2ee6657edca0bf91c98ed8a2edd52218d42604bdbaed8777060568bf26b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5648 5788 bytes
font_01_sfnt_off000069e1.bin
5205e0d3e58dbd158efc71a63a37b388e416b8ca2835d9e5d198ca3ecfeb77ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69E1 10108 bytes

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