Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7303fc46b3201b…

MALICIOUS

PDF

38.9 KB Created: 2020-08-01 04:52:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54c56291720e91095601d772eb2e95a2 SHA-1: 6487effe7e52c6f76ba1286cfb10c1f2e37c62f6 SHA-256: 3f7303fc46b3201b11da45236777db9bdb9cf95d3370c14e315cd3a4f0f0b698
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a PDF download. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=mathematical+ideas+13th+edition+pdf
    • http://files.dcmea.com/uploads/1/3/1/8/131872298/dezeka.pdf
    • http://files.rootconstruction.net/uploads/1/3/1/3/131381675/ropufisavudom.pdf
    • http://files.limetreehomestaging.com/uploads/1/3/1/4/131406222/c15acec104a.pdf
    • https://cdn.shopify.com/s/files/1/0432/2813/5591/files/adoble_reader_7._0.pdf
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/81919159897.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/26600416857.pdf
    • https://cdn.shopify.com/s/files/1/0434/6501/5446/files/29653003664.pdf
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/vasagis.pdf
    • https://cdn.shopify.com/s/files/1/0436/3255/8240/files/fojupefozinurozedamiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0432/6090/3582/files/58916346493.pdf
    • https://cdn.shopify.com/s/files/1/0431/8861/7378/files/6033086278.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/nemexe.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_off00005555.bin
8446609bc779a142b7f26453e22c2b12ab6660273e8ea7bbab50a66f388b2a2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5555 5520 bytes
font_01_sfnt_off00006809.bin
e5ae6c42ffacd2fb7caf055c69ee16e72603b0d138cd272af1a8ca4232881701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6809 12244 bytes

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