Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a616f052aec191…

MALICIOUS

PDF

31.2 KB Created: 2020-11-01 13:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa894c2338e277364b80d26d81735cb6 SHA-1: 10bb5cd83b865e2201d0541131398acc23b7bd6a SHA-256: b7a616f052aec1918d136469ee3463d87cd691fa08879b5afcba9a0ec2406498
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/123?keyword=seloc+manual+1301'. This link is likely used to lure the user into downloading further malicious content, such as the PDFs hosted on weebly.com also found in the document. The ML classifier also 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?keyword=seloc+manual+1301
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/gadixu.pdf
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/25f71d5038.pdf
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/27006e94d9e8ecc.pdf
    • https://zobovakobazazu.weebly.com/uploads/1/3/4/3/134319401/getafabulakevip.pdf
    • https://mejefarekobuk.weebly.com/uploads/1/3/4/3/134338461/lomawipolok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0502/1974/5455/files/fadosevunu.pdf
    • https://cdn.shopify.com/s/files/1/0482/6651/0500/files/tetofemuxagekufuvatimone.pdf
    • https://cdn.shopify.com/s/files/1/0478/0651/3311/files/98625031413.pdf
    • https://uploads.strikinglycdn.com/files/77fa3cfc-9e4d-43d1-b675-0e1e50e8d954/kufezukakefepijafa.pdf
    • https://s3.amazonaws.com/kavitokolezub/intelligent_business_english_book.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003e67.bin
53d5618c0bcdef89222ae619b4d4fe66952bc9b3af21f36d80c918729a4d4601		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3E67 5132 bytes
font_01_sfnt_off00004fd0.bin
ae2667b610e462ede759c44149836104ed72b8a83dcb1f7d3979f3acf28f88d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD0 9604 bytes

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