Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbae39fbebaf40f0…

MALICIOUS

PDF

43.5 KB Created: 2020-10-30 14:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab1518c86451437295ad30376c26cbdf SHA-1: 7bfd9367e80b64e9f6240a74e484b8bb09fe5121 SHA-256: dbae39fbebaf40f03bb8286ddc997b1f4ab23e6d06a3c84081dc593aef870416
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One prominent URL, 'https://gettraff.ru/aws?keyword=payday+board+game+walmart', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links, suggesting an attempt to drive traffic to malicious infrastructure under the guise of search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gettraff.ru/aws?keyword=payday+board+game+walmart
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/kesirawa.pdf
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/5679298.pdf
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/furowivawumemu.pdf
    • https://kiriwalukejogof.weebly.com/uploads/1/3/4/3/134310578/bc8dc03b505f6.pdf
    • https://xukolewijox.weebly.com/uploads/1/3/4/3/134320036/478762.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/zanadutut_wexudafenatogun_jetomefoja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8477cd8d-5847-48c3-93ff-76c3fe0c8450/kigegoxavowafevobodemoxex.pdf
    • https://uploads.strikinglycdn.com/files/4e747304-628e-4233-931e-854061d77b09/esquema_de_un_ensayo_reflexivo.pdf
    • https://uploads.strikinglycdn.com/files/8407439b-9dd1-4833-a6e7-140b46ee979b/discovering_computers_2017_shelly_cashman.pdf
    • https://uploads.strikinglycdn.com/files/2cecbb64-dca4-4007-b959-a7e0ec2335f3/29910571432.pdf
    • https://uploads.strikinglycdn.com/files/24c04ea2-5a4e-486e-a175-9faa35a201f9/jupin.pdf
    • https://cdn.shopify.com/s/files/1/0481/6424/1561/files/ciencias_sociales_edelvives.pdf
    • https://cdn.shopify.com/s/files/1/0497/8039/2103/files/fluke_376_fc_manual.pdf
    • https://uploads.strikinglycdn.com/files/d0356d55-9ffa-4c5c-989e-f7309902ab04/67119684417.pdf
    • https://uploads.strikinglycdn.com/files/94852fd3-983e-4022-9b8d-29465eaeb978/fatufif.pdf
    • https://uploads.strikinglycdn.com/files/53e6d1b0-b3f0-4dba-bdc5-a63e030ba213/56937479180.pdf
    • https://uploads.strikinglycdn.com/files/b03bf079-540b-439b-96a7-d162925225ee/wewezavawijuwas.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079b3.bin
2b28179d6495daed4f97339353fda2593dc51c311827b703f3ead855115fcb94
pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 5300 bytes
font_01_sfnt_off00008bb7.bin
b6b17458e38be91787fe0258488793f5a6d378a32416da4e86ebf5aa8167cce7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB7 10576 bytes