Malicious PDF — malware analysis report

Static analysis result for SHA-256 323f79b8338cda60…

MALICIOUS

PDF

36.6 KB Created: 2020-08-20 01:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61a312287400b754df300edafab81462 SHA-1: d274e4148d0b3c6bf4861633a86b49d53afe385a SHA-256: 323f79b8338cda60ee3c111c41e0a2809683c2b0822ef61a9be78460743ba40a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for PDF_SEO_LINK_FARM indicating a link farm. One of these links, 'https://ttraff.com/pify?keyword=gypsy+jazz+violin+sheet+music', is flagged as a malicious redirector. The document body contains garbled text but includes the same redirector URL, suggesting an attempt to lure users to malicious content through a large number of external links.

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=gypsy+jazz+violin+sheet+music
    • http://xolidikol.tracygrammer.com/uploads/1/3/1/4/131453960/2566f6969680.pdf
    • http://nidabi.mainecsta.org/uploads/1/3/2/3/132302978/fanujolu-nuzilovugib.pdf
    • http://files.sandlakegoldens.com/uploads/1/3/2/6/132682471/pizijufoxe_xirukute.pdf
    • http://files.5ivezero.com/uploads/1/3/1/4/131437538/boxuzuzege-jamov-susaxozokusonir.pdf
    • http://files.dennisgshoemaker.com/uploads/1/3/1/4/131453651/gewanalelotabu-zumeferunibode-nanenipuwamupu.pdf
    • http://djangoinjune.com/files/Gypsy%20Jazz%20Tunes.zip
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/vuvadizivivawozituti.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/tourist_map_barcelona_spain.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/zobuvavavinomizeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1194/files/18099731743.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/62178627018.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/42425042822.pdf
    • https://cdn.shopify.com/s/files/1/0432/4153/7696/files/35460166489.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/32987932325.pdf
    • https://cdn.shopify.com/s/files/1/0431/7144/6939/files/53136669180.pdf
    • https://cdn.shopify.com/s/files/1/0454/1009/1176/files/kundalini_spirit.pdf
    • https://cdn.shopify.com/s/files/1/0432/2289/2711/files/tofeta.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_off0000509a.bin
d07c8596424089094318405cbf4beb7072c85946549b6169dcabf10f90b45ee7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x509A 5396 bytes
font_01_sfnt_off000062f0.bin
22006400e59348e4affc354a7e5f919638b8b4d5c01a272942d9d09e5270e45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 10208 bytes

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