Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67fdb6a51877f3f…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 01:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76143ac8394a9313f6e0546258980bee SHA-1: ee7ecc285532cac4c7e3cd49d35144a8b9d48c05 SHA-256: c67fdb6a51877f3feb2726779e13bbb6e89bc9238b349a49bc25beec2c2059dd
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=literal+equations+practice+worksheet+pdf'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains the same lure text and URLs, suggesting the primary intent is to redirect users to malicious infrastructure. No scripts were extracted from this sample.

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=literal+equations+practice+worksheet+pdf
    • http://files.stuccoriverside.com/uploads/1/3/0/7/130775833/5505738.pdf
    • http://zixoxurep.lightbobs.com/uploads/1/3/2/7/132712615/mexug_nunimujojut_vovetupesikefo_wawevukefola.pdf
    • http://files.velaband.org/uploads/1/3/0/7/130775370/jizafebitabigovot.pdf
    • http://files.snerbyarn.com/uploads/1/3/0/7/130775732/6351b8b5.pdf
    • https://cdn.shopify.com/s/files/1/0436/1243/8685/files/26541336379.pdf
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/87784829583.pdf
    • https://cdn.shopify.com/s/files/1/0434/4446/9927/files/muxizosukagizazavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7020/1760/files/86880642957.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/2642921463.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8757/files/61225597626.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/waxebeterox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8392/files/pinajabidalo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/atulya_bharat_book_in_gujarati_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2739/0887/files/jawibax.pdf
    • https://cdn.shopify.com/s/files/1/0428/4760/0796/files/wowixibugosa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/wifujidovuso.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_off000062a6.bin
c4da9eb0a434bd515dd3a4b037616688ed2024955ac976b75e62e6577c6c225a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62A6 5468 bytes
font_01_sfnt_off0000754b.bin
832074f09b050524e493d2a7ab51a92b7f167a242111dbe2e21fb94b002d95ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 10268 bytes

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