Malicious PDF — malware analysis report

Static analysis result for SHA-256 956bb7c95e28a27e…

MALICIOUS

PDF

46.0 KB Created: 2020-08-30 20:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0be768d9f3321ce1deaff43ccf3885d SHA-1: a6054b2adc8ef992756149cbe20275d4bb5e3c0c SHA-256: 956bb7c95e28a27e0cc7ab7161f653ecbfda9e984c01719fffb74ed567e59b40
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this same URL. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious URL is likely intended to redirect users to a phishing site or a download server.

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.cc/wix?keyword=lego+lord+of+the+rings+weathertop
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/form_5329_turbotax.pdf
    • https://cdn.shopify.com/s/files/1/0461/0732/8675/files/best_builder_base_5.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/kutowonigutaralukafuwibu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/post_workout_stretching_routine.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/vesozagorupunixajifula.pdf
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/autodesk_download_older_versions_of.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/60996200651.pdf
    • https://static.usrfiles.com/ugd/f0f215_e47e9228c9954eefa3fb9c9f8bcccb96.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_649517d3e2b14ba1816d4229783b3e13.pdf
    • https://static.usrfiles.com/ugd/b8c837_b240dd75caa84d1f8ed42af41277e259.pdf
    • https://cdn.shopify.com/s/files/1/0436/6965/1606/files/4656164349.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/xedula.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/java_spring_annotations.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_off00007508.bin
907942a3325a026f141f671d75c42a3942d8a820b55223d751d509bdb268b9ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7508 5336 bytes
font_01_sfnt_off00008742.bin
12681373bcda1ab1ef9cb333936ff359a65673ea87c9e839ff3448ddf6f3f274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8742 10624 bytes

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