Malicious PDF — malware analysis report

Static analysis result for SHA-256 404f8dc7622e1e77…

MALICIOUS

PDF

44.0 KB Created: 2020-08-19 15:40:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f58f886e61014c49f0ab9241d7045ec SHA-1: b843e10b2401990130af757ab56f0fe9913dd178 SHA-256: 404f8dc7622e1e77b7c60434a9f3505ffc0e707570226f65c6e040c8ea3d4924
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, https://ttraff.com/pify?keyword=ancient+paper+powerpoint+templates+free, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL, suggesting the document's purpose is to redirect users to malicious content under the guise of offering free templates.

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=ancient+paper+powerpoint+templates+free
    • http://files.twohoursinthedark.net/uploads/1/3/1/0/131070160/bemadezelo_limudubuvixuwo_kekud.pdf
    • http://files.submittoflog.com/uploads/1/3/0/7/130775368/wugesaludujaxex.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/necromancer_5e_spells.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/kusorimatovifozefikime.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/waxuresivegurawixada.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/4810469511.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3494/files/51776148727.pdf
    • https://cdn.shopify.com/s/files/1/0431/7777/1162/files/senusazitatobivuvara.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/vawiwidukitivi.pdf
    • https://cdn.shopify.com/s/files/1/0428/3216/7068/files/bapewu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0519/7985/files/vaxajejebotari.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/varoketedinexidofupib.pdf
    • https://cdn.shopify.com/s/files/1/0432/4520/7714/files/97157049916.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/associer_plusieurs.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006253.bin
5dd93381b874959ccc1b9067b2ca482ace49bdc0355d8ec87d6a32be4e26ac32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6253 5028 bytes
font_01_sfnt_off0000734e.bin
09db4b3ff4a04215f20e4a30309461948262955244fa9b2aef3c69841f0d25d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734E 9868 bytes
font_02_sfnt_off00009513.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9513 4324 bytes

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