Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72b5878076895fb…

MALICIOUS

PDF

42.6 KB Created: 2020-09-05 08:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6e1b99de31b4800a73f0a6b9ac41798 SHA-1: 6f623472be10493e63686a37eef1f17fd3c5c91a SHA-256: a72b5878076895fbbfc70a1d27ce8a2c2c485f02bf1d614c56f1cb210c1bb704
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=anime+mobile+apk+2018'. This indicates an attempt to lure the user to a malicious site. The document body, though heavily obfuscated, contains this URL and numerous other links to PDF files hosted on Shopify and usrfiles.com, suggesting a link farm or redirection strategy. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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=anime+mobile+apk+2018
    • https://cdn.shopify.com/s/files/1/0428/9947/2551/files/75193696245.pdf
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/lovenexazaxepa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/11645001125.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/41193125828.pdf
    • https://static.usrfiles.com/ugd/5bb01c_9536e56feaeb47d28ccd2146c584e734.pdf
    • https://static.usrfiles.com/ugd/74e9cf_efec9999460c4cbf85d6621c4dfeb6ca.pdf
    • https://static.usrfiles.com/ugd/9c0842_890941ac21fa4c90b4223b3ba24e539c.pdf
    • https://static.usrfiles.com/ugd/880a7e_dcca34809cf94667818a8c66bc48d3a5.pdf
    • https://static.usrfiles.com/ugd/4bdc6d_ad81d3662a1b4911af4dece5fafd7626.pdf
    • https://static.usrfiles.com/ugd/3aca14_f8158faf9e3c49c58e52d83fd3a568ad.pdf
    • https://static.usrfiles.com/ugd/1715bf_76052869016d46f0bd947dd3012db726.pdf
    • https://static.usrfiles.com/ugd/4dbf3f_a8b4a888b85f4ec89baff2ac4f499369.pdf
    • https://static.usrfiles.com/ugd/7f16bd_250cb5ff56054be1a5043783d460fdbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8ccf7910b4a148a2bd9714247274e312.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/tatiwavosaginadep.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/69936877748.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_off00005ed9.bin
c3151d39541a9f0adf3ec04eee9d8ea4c0bb006b9739da374130546a58df807d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED9 5404 bytes
font_01_sfnt_off0000712e.bin
a33cbe4b2d8c23997e9c507eb3757192d8510ac686315845ba514a50bd1d86b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x712E 14568 bytes