Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03bae71c052bfe6…

MALICIOUS

PDF

45.8 KB Created: 2020-09-05 05:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c56ec6e8a732a0046ec057797cc306d SHA-1: 42b35897e356a02b2efb2f3d1253bc863a1ef066 SHA-256: a03bae71c052bfe6dfa65397504852669416c589fc92027653c3ae7c7972ffa5
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=communist+propaganda+poster+template'. This URL is presented within the document body, suggesting a social engineering lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a malicious site.

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.link/wix?keyword=communist+propaganda+poster+template
    • https://cdn.shopify.com/s/files/1/0429/8348/9687/files/bedota.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/vaxunutafaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/71184293345.pdf
    • https://static.usrfiles.com/ugd/b4609a_6410a8e51234467abf8bb41d8deacd02.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0f034a21b39484ca9803036e72f6feb.pdf
    • https://cdn.shopify.com/s/files/1/0430/1425/8851/files/hetalia_spain_x_england_fanfiction.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/47836771917.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/2777049817.pdf
    • https://static.usrfiles.com/ugd/f8de3e_1bf51f25a1ef4ee89be069feca462828.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_3ff4fa90ba7143a8bd71585f02ba1c1f.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_off00006d2f.bin
50042844bf407b7e892a99c0ce329116ca5a4091ae2e264d00bde3177cdfbaf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2F 5184 bytes
font_01_sfnt_off00007eb3.bin
0f7e0bdf166d0a3b225f3211e8cb5d3dcd04c99f69409c2d5c800b67cb7443c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB3 13980 bytes

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