Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc88f68e1d6001e7…

MALICIOUS

PDF

39.8 KB Created: 2020-09-02 04:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ca2620edbb3b6dc6aa71ad8e2dd4331 SHA-1: 990e315378cd590b040e8c0e5b675697c3fb1ea0 SHA-256: bc88f68e1d6001e7fedf2e2a8c768f3e52912b4d139c994deeffe38e4bc21130
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=bully+english+answers+android'. This URL is presented within the document body, suggesting a phishing or scam attempt. The presence of numerous other PDF links, while many are benign, indicates a potential link farm strategy. No scripts were extracted, and the document body is heavily obfuscated, but the primary malicious intent appears to be redirecting the user to the identified malicious URL.

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=bully+english+answers+android
    • https://cdn.shopify.com/s/files/1/0433/4419/9829/files/canada_business_corporations_act_form_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/1139/8041/files/72543470843.pdf
    • https://cdn.shopify.com/s/files/1/0432/3426/3199/files/23048803752.pdf
    • https://cdn.shopify.com/s/files/1/0437/6231/9517/files/christian_haggadah.pdf
    • https://static.usrfiles.com/ugd/a382ee_1a1ff32399f443179c482648b713b4c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a94da9403b274d20aff407ca5f7507fd.pdf
    • https://static.usrfiles.com/ugd/89c6ad_d31f47accbff47cc9b00f2c486ca4b3f.pdf
    • https://static.usrfiles.com/ugd/6f58fb_7436d15a3c124ef086f80ac014f56cfa.pdf
    • https://static.usrfiles.com/ugd/74a852_31e1cbd1c3af4c79b494bf3b6d802334.pdf
    • https://static.usrfiles.com/ugd/724bd4_3f22dd71854b460696a5318ba4faaaf1.pdf
    • https://static.usrfiles.com/ugd/105a8c_03c41cd6b4474bc98964a7c5eacb01a5.pdf
    • https://static.usrfiles.com/ugd/07625c_01fdd18746574bc9a9c17e4d5b09d05d.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_off00005d5d.bin
ebef5cfad00fa17204511e956e515241ca3cb85c80141f42441fd744853e522b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5D 5328 bytes
font_01_sfnt_off00006f91.bin
726900aae597262c03985a7c2790650e3b97438ac69bee0679fce03f0e6f63a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F91 10288 bytes

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