Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf698a22100f4abc…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 00:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac513dd8d7504a256afcdc7d61ac3a2b SHA-1: e5fd4d76226a1858d0c2d140d244420171c9c0d3 SHA-256: cf698a22100f4abc195aa51fbd242f0de1617f4a342f5b8100d7a1f3376ccd23
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to known malicious infrastructure. The document body, though partially garbled, contains text related to a free PDF download and a URL that is also flagged as a malicious redirector. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger scheme to generate traffic through link farms. The primary malicious IOC is the redirector URL.

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=zend+avesta+espa%25C3%25B1ol+pdf+gratis
    • http://files.monumentblog.com/uploads/1/3/1/3/131381031/ec211d84a.pdf
    • http://files.jillwilliamsfineart.com/uploads/1/3/0/7/130775970/2073e799.pdf
    • http://files.koalaremedies.com/uploads/1/3/1/4/131453725/5389291.pdf
    • http://files.dancingtribescotland.com/uploads/1/3/0/7/130776661/jomakufobiw_kunuvubaf_bafudajitafige_pimexodexiguk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/34272225177.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/repovolipirodexaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/todenukujajorefimazimegi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/43763459508.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/dojegaxupusabomi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/xopuketaluratebowapikaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/53403104154.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/22249021113.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/sorituzozizeve.pdf
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/gta_5_cheat_code.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/22224813736.pdf
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/56455754377.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_off00005fb6.bin
08c94c30349a2726cc180fe90b0ae26731abd8850247ede8c19c948783157cca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 5228 bytes
font_01_sfnt_off00007153.bin
1a9fcf682cfedfcdbc48e53ed54e00f29e7d53146950ce7e8f0aeb75730ce34d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 11060 bytes
font_02_sfnt_off000096ae.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x96AE 4324 bytes