Malicious PDF — malware analysis report

Static analysis result for SHA-256 503bb271711f1967…

MALICIOUS

PDF

51.4 KB Created: 2020-11-05 17:08:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0c48da16e02a6be51192bc2f8bfc2cfe SHA-1: 287c1f04d2cffab32524d920e5b40dbfe788f17b SHA-256: 503bb271711f1967702f167a0269c71b35b20be1681d890b6fac6b48ecdd15da
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/aws?keyword=fawcett+oil+worcester In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_5f9377ae3e3ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5f94131dc056b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426262/normal_5f9fb4e2014f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5f97eb71f04ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427781/normal_5f9fc1fc66fb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870bf5678ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f955983015be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/juliziwojatige/maytag_msf22c2exm01_ice_maker_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/17194269444.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000947b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x947B 19244 bytes
SHA-256: 8f573755b3eef099adb23be00444a4380d0dbe0aa33cbf2d73a4fea5fbb8c91f
font_00_sfnt_off00005ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED5 4520 bytes
SHA-256: 390e3f6bbe94b2a38e277ff6ecdad9243abacdaf64a1f23c2ccf95a6d2863d6c
font_01_sfnt_off00006e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4C 11588 bytes
SHA-256: e963d437b7eacb794f85dd436103ffe4fe469be8ed895b7788c2a22c982db3fa
font_03_sfnt_off0000b332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB332 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2