Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6877ba9050032a…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 09:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1b863702c21b6a8250016f95a51b439 SHA-1: f7edcaf910cf684ce47e0d156e22800800d7e4c1 SHA-256: 3d6877ba9050032abb323a1a8bc63da43c039609c7348f5345c73d8b3b940fee
130 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'https://ttraff.cc/pify?keyword=libro+balun+canan+pdf+gratis'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external PDF links, many hosted on Shopify, suggesting an attempt to game search engine results or distribute malicious content. The presence of a 'download button' lure further supports the malicious intent.

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/pify?keyword=libro+balun+canan+pdf+gratis
    • http://files.trianglemarketplace.org/uploads/1/3/0/7/130740205/bowibibubufi.pdf
    • http://files.zpchurch.org/uploads/1/3/1/4/131407469/kudefinugipozo-sebono-nurexipevo-vopudim.pdf
    • http://files.americanlegionpost141.org/uploads/1/3/2/7/132712000/cb06322c6e.pdf
    • http://files.losangelesmakeupartist.org/uploads/1/3/0/7/130776590/5695188.pdf
    • http://files.vividskateshop.com/uploads/1/3/0/7/130776852/4613940.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/jepuvoxufokiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/80293744204.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0523/files/37333701820.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4885/files/pagokepoxenad.pdf
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/guwodisowino.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/44750857108.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/89138674346.pdf
    • https://cdn.shopify.com/s/files/1/0438/8985/2568/files/comment_briser_les_liens_ancestraux.pdf
    • https://cdn.shopify.com/s/files/1/0429/6871/1321/files/rowesimuparadidebizajegi.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_off0000676b.bin
1a1138babc3c01700017a827032135c7bd7980757bed7974fd80087b597f9936
pdf-font-stream PDF embedded font (sfnt) at offset 0x676B 5404 bytes
font_01_sfnt_off000079d9.bin
9ff6fe4080d7ee25bed87220b58d46c7f2e4625237beda81f4fcb084f8da16d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x79D9 10112 bytes