Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf9bc7ed3505bcf…

MALICIOUS

PDF

48.0 KB Created: 2020-08-29 02:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 856ca2aea4bf6e8f6206afcf24f0ca51 SHA-1: 694d6f82a67869e7046de16ef0462a8d3ea28186 SHA-256: 0cf9bc7ed3505bcf581fe0aa570a0ba483f6946da56258b11bc1257fb43d9e50
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=roccat+lua+mouse+driver'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, suggesting an attempt to drive traffic to malicious sites. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=roccat+lua+mouse+driver
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_c7721a74e7c04820b2f17953fdbb5f10.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3b654f51e954338b4cbf57c9b712593.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b97fb78eee549dcaf2e84662fdc8bc3.pdf
    • https://static.usrfiles.com/ugd/b8c837_614dab093aae428c81c5799293fc0278.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bddbc0c184c4f569ac293a086fe92a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_d24f5c1e38fc4a3c91b54e5b65764412.pdf
    • https://static.usrfiles.com/ugd/b8c837_73a80f57492649dd8f59a51421ebdead.pdf
    • https://static.usrfiles.com/ugd/b8c837_1222179c8d6948a5a40eb6c91c9f5962.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wososopozabe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7753/2822/files/accomplishment_report_intramurals.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/48729356203.pdf
    • https://cdn.shopify.com/s/files/1/0437/7644/2519/files/95210842673.pdf
    • https://cdn.shopify.com/s/files/1/0434/1239/0038/files/66948319095.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/blindspot_season_4_episode_19_subtitle.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/jitolelomuzasixazewo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73881495537.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ed7.bin
be14a5f64c3f40e517b4fb40feaf3d71f2f8926a09b519e7794ce72ce4d06929		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED7 4928 bytes
font_01_sfnt_off00007fa1.bin
44e4f7a09575147a76befa0c205ef6fe7c536dcfc6354f8d315161ad4248c566		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA1 11364 bytes
font_02_sfnt_off0000a515.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA515 4324 bytes

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