Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad88842f6fba8415…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 06:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 064a7144dc19f2d5aad92933e577e61e SHA-1: 63b95e9ad9084be7c5bb9264a5be882fa418f888 SHA-256: ad88842f6fba8415d8020f7d5fa314ed66584aaa91ad08bb5a5232781a07ac1c
128 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=acrobat+reader+merge+pdf'. Another critical heuristic identified a PDF link farm, suggesting a common SEO poisoning tactic. The presence of a 'Download Button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the document body and heuristics indicate a phishing or redirection attempt.

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.ru/pify?keyword=acrobat+reader+merge+pdf
    • http://files.tereayersmusic.net/uploads/1/3/1/4/131407423/92c0a5caf8f.pdf
    • http://files.bornfat.org/uploads/1/3/0/7/130776641/jivarilax_dufisitepisuw_butujokabomosu.pdf
    • http://files.dena-robertson.com/uploads/1/3/0/8/130874296/sejiverodopiju_fuxivaleri_gugizef.pdf
    • http://files.emilyjordansmith.com/uploads/1/3/1/3/131381976/8709730.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8997/files/88210734289.pdf
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/ropogipozije.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/kumamunukikafobotesu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/65763045143.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/78049263237.pdf
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/aptransco_syllabus_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/abstraction_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/bivipolanotelavawo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/nepemimukagod.pdf
    • https://cdn.shopify.com/s/files/1/0431/0138/8953/files/36677926858.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/89095952123.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_off00005ea9.bin
a2db08e4c29ae8069db77f9bfe111dfd8e8f0b4a839fa25af9a19f0571909ae9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA9 5392 bytes
font_01_sfnt_off000070ed.bin
a44de0a50356e6b9afeba4b12fbaa8e8bca1c37b70b385335bca045cb4924b2f
pdf-font-stream PDF embedded font (sfnt) at offset 0x70ED 10304 bytes