Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c54fde6d914510…

MALICIOUS

PDF

49.3 KB Created: 2020-09-02 02:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c90a1bafb53bc62422fadcbacfa2972e SHA-1: c40783239274db291c2500c33afeb1943571b9cf SHA-256: 26c54fde6d9145102fe5bc947c20fb3ec8ebf04a3e45b4d3aeb7bbe506cbd944
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=bejeweled+3+full++pc'. Another critical heuristic indicates a PDF link farm, with 'https://static.usrfiles.com/ugd/b8c837_70a1ffe7f8bc4e2f9c2a1297548aa03e.pdf' being the first URL in this farm. The presence of a 'download button' heuristic further supports the lure mechanism. The document body, though heavily obfuscated, contains these URLs, suggesting the intent is to redirect the user to malicious content.

Heuristics 4

  • 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
  • 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=bejeweled+3+full++pc
    • https://static.usrfiles.com/ugd/b8c837_70a1ffe7f8bc4e2f9c2a1297548aa03e.pdf
    • https://static.usrfiles.com/ugd/19ce5d_24f1bee9e5d5434b8618d5b54ddb5ea3.pdf
    • https://static.usrfiles.com/ugd/d54300_5c127737f5ed4f8faabac0ad9d2d57ba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/abecedario_aleman_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0433/1814/9285/files/22651315931.pdf
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/ledibulomopeta.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/past_continuous_tense_worksheet_for_grade_5.pdf
    • https://static.usrfiles.com/ugd/41f880_98bcbeb01f744717b8675fa43e42511b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c67ac548abd5477f94ec77f1fc2067fa.pdf
    • https://static.usrfiles.com/ugd/c1615c_b6e13ed3fafe42308e27880f8fa95cd9.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_ff8a64d59af64743a3eea37f9e4e5096.pdf
    • https://static.usrfiles.com/ugd/6e3131_727cb14a974f45e9ba0ab7919116e027.pdf
    • https://static.usrfiles.com/ugd/5ed537_df05c8f9798844ef8cee1d2303cc246d.pdf
    • https://static.usrfiles.com/ugd/a43ec6_6582a352419f4459881b7a40b137d7a1.pdf
    • https://static.usrfiles.com/ugd/4b7290_3912eb2130c34eedabca4524df05535f.pdf
    • https://static.usrfiles.com/ugd/b88e3d_e15ace4975614f50b2d9a8ea58303097.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/
    • https://static.usrfiles.com/ugd/41f880_98bcbeb01f744

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e21.bin
ea3a35e0eec53a8da6b0434b482b65267f2e0723fd57e374a3eaa1735c0b61c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 4584 bytes
font_01_sfnt_off00007de1.bin
643bf674354fb73bb9dedfd1d4a610861d28a72b6f4a6cf268e902f2f4030245		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 14196 bytes
font_02_sfnt_off0000aa35.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA35 4324 bytes

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