Malicious PDF — malware analysis report

Static analysis result for SHA-256 4007a13a3fcd4535…

MALICIOUS

PDF

36.3 KB Created: 2020-08-15 06:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b3ee2d6b440a8e1f8c521fee759ca8d8 SHA-1: 1bcad97dd0ba5cd9ea86616f569e247bd9635662 SHA-256: 4007a13a3fcd453590abed56a548b784f5f4c811f00ef1ffd0e061c11676161f
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link leads to a URL that is known to host malicious content. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting an attempt to disguise the malicious link within a larger set of seemingly benign links. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=compound+nouns+worksheet+grade+3
    • http://files.jjenterpriseslcd.com/uploads/1/3/1/8/131871467/fuwikunu_sufekevena_nuzofun_vabekedidadow.pdf
    • http://tanug.bearartstudios.com/uploads/1/3/0/7/130738956/7421657.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/simadigojimeraxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/oxford_thesaurus_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6513/0660/files/47040646841.pdf
    • https://cdn.shopify.com/s/files/1/0434/7805/7122/files/case_files_free.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/varigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/66570083503.pdf
    • https://cdn.shopify.com/s/files/1/0447/9765/7248/files/31976246928.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/canon_canoscan_lide_300.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/63399143357.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/able2extract_converter_online.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_off00004f8b.bin
8e7d579b1f93ba1e782878cd3e69c2cebd817b8cf1592732a7efa3975e037e56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F8B 5568 bytes
font_01_sfnt_off00006260.bin
86f4f10de192311ecb743b9dd446590b9f3b9d263df7f7f8e8c00bc4e6e90738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 10000 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.