Malicious PDF — malware analysis report

Static analysis result for SHA-256 5417b7c26ff8711d…

MALICIOUS

PDF

79.5 KB Created: 2020-11-06 17:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21f9b02d46145e92aeb554635d6d1bde SHA-1: 804a8df9e2f70bf211af33388b8922247ce09e4e SHA-256: 5417b7c26ff8711d6603a6eb490cfefcdcc8e75895b58a44ff1891d64fafbad6
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The heuristic firings indicate this PDF is designed to link to a large number of external resources, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence suggest a deliberate attempt to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=st+marks+lutheran+church+watertown+wi
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/8147096.pdf
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f8cb47b7c0a5.pdf
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f99d031c7f98.pdf
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5f8d5592db422.pdf
    • https://cdn-cms.f-static.net/uploads/4424341/normal_5f9fb0a5ab3c8.pdf
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f9cfad3cd17a.pdf
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/8796203.pdf
    • https://bosizeke.weebly.com/uploads/1/3/4/5/134596703/jewupatuxazivuwo.pdf
    • https://luwigemo.weebly.com/uploads/1/3/4/5/134597726/fifanov.pdf
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f90ce97388e8.pdf
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f8b9e57b441f.pdf
    • https://wejuvizir.weebly.com/uploads/1/3/4/3/134395749/dowunadu.pdf
    • https://nonesuwenuvav.weebly.com/uploads/1/3/4/4/134400251/kivamo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f9ce.bin
7d9af959a0c1045df4c0f84dd67933a0b839c7450ac10050f390e3465e70b24f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 5296 bytes
font_01_sfnt_off00010bb3.bin
3356fb10bdf8b6ba86885c91fd15a43c61b22073931c85e3d70065aa0d0fedbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB3 10864 bytes