Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cea84e5c20272f1…

MALICIOUS

PDF

73.5 KB Created: 2020-09-01 00:23:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75589e8ffbc8da68340977e324e53c3e SHA-1: d9746c05f51b433ee095b4e370444e2fb184adad SHA-256: 3cea84e5c20272f1525800b98dda5a2d3b4448dcd30425bc75a8ffa79669389f
120 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.com/wix?keyword=format+authorization+letter+process+documents'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf' being the first identified. The document body, though heavily obfuscated, contains text related to 'format authorization letter process documents', suggesting a lure to disguise the malicious intent.

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=format+authorization+letter+process+documents
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/37321431831.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/jisare.pdf
    • https://cdn.shopify.com/s/files/1/0443/0331/9196/files/50803028910.pdf
    • https://static.usrfiles.com/ugd/ea78e0_61bc274135ae4f599da8da39530bef63.pdf
    • https://static.usrfiles.com/ugd/c1615c_870fa0ff60e24807824b7f453c1b2749.pdf
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/rimworld_tattered_apparel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8266/8437/files/zumamopadozas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3323/0488/files/56655981896.pdf
    • https://cdn.shopify.com/s/files/1/0435/3907/1130/files/tratamiento_de_absceso_dental.pdf
    • https://static.usrfiles.com/ugd/32acb1_ba8fc514d76343bbb9126ee7405e1248.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c43ab42b40f4f7a892d247be19dfa8a.pdf
    • https://static.usrfiles.com/ugd/9c43ec_abb6572f1c724872ae86c6c1d5097a2f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99c.bin
3b89a1333aa93e194de12c5c5da229a8f3a969ace6b07a90c5323b9ece6747ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99C 2828 bytes
font_01_sfnt_off0000e397.bin
cf2ac72fbb8167f6852eae3b6f0ddcd6b5e23f9cc2f17a4c97720ff839d105b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE397 5320 bytes
font_02_sfnt_off0000f585.bin
0e6ee80187de2482b28a385547d334957f8217a5ac35e4b7121394fa2cfd24b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF585 10120 bytes

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