Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c16397f0206e623…

MALICIOUS

PDF

33.1 KB Created: 2020-09-10 11:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fd6783725eaca162b9d9659381363b5 SHA-1: 38e452b01b2e04a973d5d132702fd6f3ac8111bf SHA-256: 1c16397f0206e6233088aef96e86ff8214a55aade519de6ce9e984fa0bbb5480
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 external PDF files, characteristic of a link farm. One critical heuristic firing indicates a malicious redirector link, specifically `https://ttraff.club/pify?keyword=civilizations+develop+around+the+world+answer+key`, which is designed to lure users into clicking. The document body, though heavily obfuscated, contains this same URL, suggesting it is the primary lure. The file is likely part of a campaign to drive traffic to malicious sites.

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.club/pify?keyword=civilizations+develop+around+the+world+answer+key
    • http://xuwuveg.thepilatesgathering.com/uploads/1/3/1/6/131637136/womiwudebibal.pdf
    • http://files.loumurrey.com/uploads/1/3/2/6/132682542/rajun.pdf
    • http://josojek.orthodoxiona.com/uploads/1/3/1/1/131163981/4386782.pdf
    • http://files.thevillagepets.net/uploads/1/3/2/7/132740214/8505358.pdf
    • http://jaloxore.felipehuesolaw.com/uploads/1/3/1/8/131856033/1345921.pdf
    • https://static.usrfiles.com/ugd/3be3a7_39c06410807845d58ac75b28359b7e3b.pdf
    • https://static.usrfiles.com/ugd/a8cc01_7a4fe07137454ccdb2608c6e5c2546b8.pdf
    • https://static.usrfiles.com/ugd/98d33d_2d78ce9d9198416fb48a721b923df738.pdf
    • https://static.usrfiles.com/ugd/de60da_3efbfa0cd5454a14b50a5e7e4a6b279c.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/too_many_items_1._13._2.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/67353286643.pdf
    • https://cdn.shopify.com/s/files/1/0430/3313/3209/files/83546057374.pdf
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/struts_1._2_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/0082/2934/files/cape_town_map_download.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_off00004523.bin
762addf01b0da7997de0d47fa79d804eda814973637047bf948d674430e779fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4523 5320 bytes
font_01_sfnt_off00005750.bin
8473ce2ed97da7bb52e364de3b853660885006b3e38edd556932a2621632e9d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5750 9404 bytes

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