Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3a6a55c4939f25…

MALICIOUS

PDF

88.8 KB Created: 2020-08-05 11:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4189549165d11de3c93665a72dec361 SHA-1: fc725812ac171e542e2d5597a13a47250cf5863b SHA-256: af3a6a55c4939f25d73985b914d87e5f42c6632ca297ad32e1b9d6b806be5837
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=online+bible+kjv+pdf'. This URL is presented in the document body, disguised as a search result for a Bible PDF. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier 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.ru/pify?keyword=online+bible+kjv+pdf
    • http://files.santarosapool.com/uploads/1/3/1/8/131856121/rigupakufi-negetefame-sanokapadawuw-wifefatuwizu.pdf
    • http://files.earforlanguage.com/uploads/1/3/1/4/131454207/vizuta.pdf
    • http://files.buiebeadz.com/uploads/1/3/1/4/131483830/zolorixitar-tolakawasob-vanusuwofov.pdf
    • http://files.dragondistillery.com/uploads/1/3/1/4/131483002/vilexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/97025685392.pdf
    • https://cdn.shopify.com/s/files/1/0428/2282/8198/files/guwufufefixiz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/fileruwaxisim.pdf
    • https://cdn.shopify.com/s/files/1/0430/7802/5377/files/75428500722.pdf
    • https://cdn.shopify.com/s/files/1/0437/3970/9605/files/realtek_ethernet_driver_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/vibamupuse.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/77026226685.pdf
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/99906950547.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/luvokodofalesin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/livoxigugefeguvon.pdf
    • https://cdn.shopify.com/s/files/1/0439/0833/3736/files/ghost_mushroom_farming.pdf
    • https://cdn.shopify.com/s/files/1/0430/9375/4009/files/mojoliworaxevulow.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/wusube.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/timemudokor.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_off00012296.bin
82719fe86cf0289c3a6a6f31ca222d05d313301c055a589d2ea38c8166f25ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x12296 4920 bytes
font_01_sfnt_off00013372.bin
51ce8a0e1f9f72ecf6ab62e98ae021ccc1b5e643025c9aa02e1e3d1592a11739
pdf-font-stream PDF embedded font (sfnt) at offset 0x13372 9992 bytes