Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a1c3f2f9d6631d3…

MALICIOUS

PDF

37.7 KB Created: 2020-09-16 13:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 792494be2b06606e875d7f005e590a53 SHA-1: b16a7e5da5c533de253feaa00faac61407470dbd SHA-256: 9a1c3f2f9d6631d364ac3dc2e7f02fc4a5982143bbd4651ad578e75c62668f29
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to a school website and the malicious URL. The primary malicious URL is https://ttraff.club/wix?keyword=happy+valley+high+school+website, which is likely used to redirect the user to a malicious site. The presence of numerous PDF links, many hosted on shopify.com, indicates a link farm designed to improve search engine ranking for malicious content.

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.club/wix?keyword=happy+valley+high+school+website
    • http://nenatelo.amyandrewsmusic.com/uploads/1/3/1/4/131482995/9098735.pdf
    • http://files.hickmanfootball.com/uploads/1/3/0/7/130776788/kamubumul-dobozokowobiz.pdf
    • http://vuvujireb.southtownscatholic.org/uploads/1/3/1/3/131384169/zojuvajo_rudubex_lasibutarezuza_lubigeroro.pdf
    • http://files.enjoyourlife.net/uploads/1/3/1/4/131437953/lonoj_buxizigosux.pdf
    • http://files.modest-couture.com/uploads/1/3/1/4/131453695/tizosazumazujes-sefufugudile.pdf
    • https://cdn.shopify.com/s/files/1/0429/5006/6339/files/32482567675.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/dupegajafel.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43106273748.pdf
    • https://cdn.shopify.com/s/files/1/0435/4995/0111/files/3716321656.pdf
    • https://e299cd96-f5fa-4e4d-b8e8-22454be6cfe7.filesusr.com/ugd/f08e01_679e309ffc6a4bc384e90ec11d4089a6.pdf?index=true
    • https://e44c3155-bca1-4daa-ab8a-460573827c12.filesusr.com/ugd/58a813_970dad472a4e47d593e0db25c6010caa.pdf?index=true
    • https://3f25dd9f-3614-4f1d-a894-2d288cdfd54f.filesusr.com/ugd/1c44ce_b308310ca3c54b70af27cb9cde96d5a4.pdf?index=true
    • https://5dd11264-e94b-46c0-ad94-8984b9cf59d4.filesusr.com/ugd/18f527_c1b8404c182049da95fa36559e552994.pdf?index=true
    • https://911213cb-95bd-44ce-ab8a-bf6d018e9def.filesusr.com/ugd/d2759c_a67df5bdd8ab439fbb5ff1348e21ddad.pdf?index=true
    • https://17b947f8-44f0-4138-b81c-7e630413ea7d.filesusr.com/ugd/18f527_cb59c87ddc5f4345b0d0f7de2fc311d2.pdf?index=true
    • https://8496119b-30b7-4f3f-94d1-1510522d5f09.filesusr.com/ugd/5bb01c_0dfe8496ddab4755a6711baf5faec18d.pdf?index=true
    • 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_off000051f7.bin
ce1e051a59c698a13db3c8326b960b9e17398d6e5318496a786db3459c765893
pdf-font-stream PDF embedded font (sfnt) at offset 0x51F7 5452 bytes
font_01_sfnt_off000064a0.bin
a4f8b11ef454403e7130da3ddd640503318da1c96a2699f763c89e2e653bbd79
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 10856 bytes