Malicious PDF — malware analysis report

Static analysis result for SHA-256 d92b276e02e20e24…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 12:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0422d5a2b55cd622a2f8fe7685a9a0ad SHA-1: 19d5119835f4ca9413b45fd9a584a1ce5d5001c1 SHA-256: d92b276e02e20e246a10990dbbce8343828f5da66ecfcff630ff1b1883a2424d
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a software database, and the presence of a password archive lure heuristic suggests the document is intended to trick the user into downloading a password-protected malicious archive. The primary malicious URL is https://ttraff.cc/pify?keyword=chessbase+mega+database+2018, which is a known malicious redirector.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=chessbase+mega+database+2018
    • http://files.johnrichardsonimages.com/uploads/1/3/0/8/130874124/eef5da.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/werozetamixi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4693/6482/files/tugibubumalug.pdf
    • https://cdn.shopify.com/s/files/1/0431/1931/3053/files/vuzox.pdf
    • https://cdn.shopify.com/s/files/1/0452/1210/6912/files/basketball_score_sheet_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/8774/8519/files/i_kissed_a_girl_jill_sobule_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/fabukepejeridavi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1664/2975/files/64290677811.pdf
    • https://cdn.shopify.com/s/files/1/0431/6659/7288/files/20629054661.pdf
    • https://cdn.shopify.com/s/files/1/0436/6182/0054/files/autentico_spanish_2_textbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/environmental_impact_assessment_project_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/magototadiresusifakilir.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_off00005d54.bin
e03f188fe627e0d43bb51b38a51e28affb75a5a5e9ac870feaedda95d605d7f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D54 5676 bytes
font_01_sfnt_off0000707b.bin
de8938c41b07f21e53c979d16c08a0b62c99b431243613d06c92ecad470075ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x707B 14076 bytes

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