Malicious PDF — malware analysis report

Static analysis result for SHA-256 d724e8e7a1685dfd…

MALICIOUS

PDF

54.0 KB Created: 2020-07-26 21:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd50984b459b3eb60ff1c35847e2fcc2 SHA-1: 41a8bb9eb205ae23106abf1af4c0a14b74afd33b SHA-256: d724e8e7a1685dfd96e3905b676e8e3ca95e16809913af86574e7cff6f81adde
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com' which is designed to lure users into clicking on a link farm of other PDFs hosted on Shopify. The document body suggests a lure related to 'Brave Frontier' game leveling, indicating a social engineering pretext. The ML classifier strongly supports the malicious nature of this PDF.

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=brave+frontier+guide+leveling
    • http://files.woodlandwisdombooks.com/uploads/1/3/0/9/130969703/nolexamapun.pdf
    • http://files.armacharlottepiedmont.org/uploads/1/3/0/7/130739027/6efe5ac2.pdf
    • http://files.ryandavidbirdlarson.com/uploads/1/3/1/8/131856257/a3089e2f3dde0.pdf
    • http://files.hordlevoluntarycare.org/uploads/1/3/0/8/130874413/zoladamalija.pdf
    • http://files.wbcslions.org/uploads/1/3/0/7/130739916/871336.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/rewezegoxafopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/suder.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kuvesagapixunijibofalase.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/rakodoxagobo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/fotonirun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7175/files/petezekogirogose.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/muzoguxavaworetate.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/60530364715.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5941/files/53149270508.pdf
    • https://cdn.shopify.com/s/files/1/0429/2768/5798/files/dubuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/vunepolunolug.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_off00009c90.bin
aeac4d0ac74a0f34c82cb305cdb7dcb364f8cbacf3177085cfc33d3197b54baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C90 4888 bytes
font_01_sfnt_off0000ad43.bin
77d168b342f06d86ba41adb5e8d96658fd2fb0e4081b203916f4e8979b7562a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD43 8568 bytes

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