Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e917acfb8d6eb7…

MALICIOUS

PDF

39.1 KB Created: 2020-07-09 11:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1461f27f9642581c1aba9a0d9f2d2d7 SHA-1: 19f15e673e2df1377fd566157de221c2d345a8f7 SHA-256: f2e917acfb8d6eb7c6cf0d7dde6a93f0276b8ec26833282df36fd678d8904167
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm, with one prominent link redirecting to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body text, though partially garbled, contains keywords related to the embedded links, suggesting a lure to entice clicks. The primary attack pattern involves directing users to external, potentially malicious, websites.

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.ru/pify?keyword=manual+bottle+washing+machine+for+sale
    • http://files.sigmakappaomega.com/uploads/1/3/0/7/130775907/e36495.pdf
    • http://files.wesleymerced.org/uploads/1/3/1/8/131871785/40b69e0782f73b1.pdf
    • http://files.balancewithreikifredericton.com/uploads/1/3/1/4/131452880/tamawulixal-rizizaxobofo-noroxawodunuwew.pdf
    • http://files.airmicrochip.com/uploads/1/3/0/7/130775902/nenexim.pdf
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131383510/7375545.pdf
    • http://files.mhecblacon.com/uploads/1/3/1/4/131437351/vasak.pdf
    • http://files.zbmtwest.com/uploads/1/3/2/6/132682561/zuveponiz.pdf
    • http://files.priestrivercommunitychurch.org/uploads/1/3/1/6/131637695/xaxobokajalusokutuvu.pdf
    • http://files.megancrockett.com/uploads/1/3/1/8/131856518/91ae79d7607.pdf
    • http://files.brittanyritter.com/uploads/1/3/1/4/131483154/rumisazenugelak.pdf
    • http://files.louisabrownholistictherapies.com/uploads/1/3/0/8/130874458/5292551.pdf
    • http://files.communityland.org/uploads/1/3/1/1/131163957/libawonowubava.pdf
    • https://napipivo.files.wordpress.com/2020/06/lugiremagigiwu.pdf
    • https://bilebapajaji.files.wordpress.com/2020/06/foxefujasenij.pdf
    • https://fufedep.files.wordpress.com/2020/07/malalifagibugitadizexil.pdf
    • https://lopititixuv.files.wordpress.com/2020/07/38859135474.pdf
    • https://vuxatuwubi.files.wordpress.com/2020/06/kuponilekekowudekidelow.pdf
    • https://difimedo.files.wordpress.com/2020/06/dalaxixizesebakoderule.pdf
    • https://wiwifidu.files.wordpress.com/2020/06/49936702093.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35022180152.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vukanuzedatijaxugevune.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65431134640.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_off00005b48.bin
5d284b36c22439ef9bbd3489c05266e926a7a64ff4e96d9af243e818e31646e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B48 5416 bytes
font_01_sfnt_off00006d99.bin
3f3faa66b1823cbb49a015e939d03a2f9c3c007e67c088450478cc084d0c3ba5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 9864 bytes