Malicious PDF — malware analysis report

Static analysis result for SHA-256 36074ca33eb5b826…

MALICIOUS

PDF

40.4 KB Created: 2020-09-04 20:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0046b015a39893878a7c6b2aa905b2c3 SHA-1: f35de1479e4758fdcffc1b5e5de117e90ba9d2de SHA-256: 36074ca33eb5b8262864b7951dbc06b79eb80073da95b3055e5166aeac7cd264
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/pify?keyword=blaster+transformers+forged+to+fight'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL and references to 'blaster transformers', suggesting a lure.

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.me/pify?keyword=blaster+transformers+forged+to+fight
    • https://static.usrfiles.com/ugd/c34eac_d685a4811e794fcd9d7374d7adedd31d.pdf
    • https://static.usrfiles.com/ugd/ce14f3_5a7150ec702e4ed881b0d51c7d49ff4c.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_83a9a618bf2247ad963530188e3d258f.pdf
    • https://static.usrfiles.com/ugd/ca300b_2d911eb0db664539afa799fcae1447e1.pdf
    • https://static.usrfiles.com/ugd/ab0441_d2a5e981a0c344ca9cfe00ab55ad3cdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/my_talking_angela_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0430/9529/4109/files/asthulu_anthasthulu_songs.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/sobokowelopelaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/9178/7937/files/hangout_extension_for_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5555796470.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_off00005fbc.bin
91633de96a7e190407214de2a4ec956ae4887a106657bf9b1c2cfea0f0f9f512		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBC 5368 bytes
font_01_sfnt_off000071d1.bin
6effac9d78791cac7f44800cbd586074fe5eb7174beb781ead224aa2eb143e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71D1 10356 bytes

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