Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bb1b3c13b225801…

MALICIOUS

PDF

40.3 KB Created: 2020-07-30 20:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f82c9b03ff30eed431f6d99391e4abd SHA-1: 7caf7cf13411cbbf407dfdae0de6698c87521ba1 SHA-256: 9bb1b3c13b225801ce72112bf587592794084edbf3206c6b7050a20d91558fe8
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to academic papers, likely to trick users into clicking the malicious link. The primary malicious URL identified is ttraff.com, which redirects to a Shopify-hosted PDF.

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=functional+analysis+sobolev+spaces+and+partial+differential+equations+pdf
    • http://files.sandracrawford.com/uploads/1/3/1/3/131380005/jesozogajebutovijaxe.pdf
    • http://files.westfieldbouncehouserentals.com/uploads/1/3/1/3/131384789/4605166.pdf
    • http://files.lamblamp.org/uploads/1/3/1/8/131871979/543126ccbca.pdf
    • http://files.lifeandpeacephoto.com/uploads/1/3/2/3/132303248/e9ad73ef5aca11.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/29485632281.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/xamupalatukogalaxomulav.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/24013837996.pdf
    • https://cdn.shopify.com/s/files/1/0433/4157/8405/files/46866698509.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/dowukoloxudabivifusovexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1647/9132/files/mumofejirapojasufatibo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/tivarojozafuvalur.pdf
    • https://cdn.shopify.com/s/files/1/0438/2919/9005/files/85546755422.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/70049714725.pdf
    • https://cdn.shopify.com/s/files/1/0431/2979/8818/files/noboxelinibobura.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/wuriligolonazapotubisik.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_off00005ed2.bin
623b1a8b8552615d69a4fece9c9f2aabbb98920ed7039e6e56c68a0de3532c8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED2 5412 bytes
font_01_sfnt_off00007143.bin
07206d25c7e6c8832882d05c35bcc8699f325f65bac7b844ad19a877cfb34bb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7143 9928 bytes

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