Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1d8e84d04ac65d…

MALICIOUS

PDF

49.2 KB Created: 2020-08-29 15:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac84a79b3fc7a984466d1d86345989db SHA-1: 195e7e4af1865fa5e95c1edf14b116aeb4297e53 SHA-256: 1d1d8e84d04ac65d1936b873dff84612668ddaa1309503c2d7e05cb0c7129deb
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to a URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=a+casa+que+pedro+fez', which is flagged as malicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign PDFs.

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/wix?keyword=a+casa+que+pedro+fez
    • https://static.usrfiles.com/ugd/b8c837_40e857416bb2443d99783f60dfa5c845.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c954b95b6f746faaf3d307c7670caea.pdf
    • https://static.usrfiles.com/ugd/b7082a_e990df50f1684f86bf33b144a3218784.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d6ac805ccef4705aeed88c6bf67e36f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2efdc721c5be42a198a14bccc0e9b925.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e0003f6df384570a96f39d9c6e2e33e.pdf
    • https://static.usrfiles.com/ugd/b8c837_14cb80bdcb40485c9783e7d101722bf0.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_c01375aaf0864ad4abc6d1bff41e099c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d2c3bb36f12404e811aa3ac48835d09.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/9910/2110/files/vuvutakibetelotejewikopuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/27469455330.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/23295269198.pdf
    • https://static.usrfiles.com/ugd/9cc572_9a75d403bb0c48798feccff2f7558e2c.pdf
    • https://static.usrfiles.com/ugd/b8c837_c21f99e7162d4716ba4de2ede43cec1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc2a8d158dd94335a705d6c1246d6646.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/
    • https://static.usrfiles.com/ugd/b8c837_

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00009b53.bin
ce0837843aae74405d92a5bf2594dc819604981fa75b2a39c7ebc51c3c55424f
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9B53 17676 bytes
font_00_sfnt_off0000668a.bin
89cb5f8c86b0fbbc7d7da88d399dbf368712bb0ef01ffe5e9d6f6c3a391bd68d
pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5280 bytes
font_01_sfnt_off00007890.bin
88ef5a323ceec1968be2dee1f600b140897132cc5901a5333d3cd5ba78f369d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 10584 bytes