Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7e59f838aa4353…

MALICIOUS

PDF

61.3 KB Created: 2020-10-27 21:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 95b03e7445795e3911fcf4a510b34c17 SHA-1: 13da27d2f2b3fb7025a11a877d1d879379da19d0 SHA-256: be7e59f838aa43538c52be25a0aeae516591d52d646006c8f3e17b4c0857e018
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external PDF files, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://ttraff.club/123?keyword=issa+fitness+the+complete+guide', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

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://ttraff.club/123?keyword=issa+fitness+the+complete+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385197/normal_5f9265d53794c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_5f92847288eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f875493bf72f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425507/normal_5f97d9f9e0ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5f8a998598936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5f91cd680bdef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f917edc46e1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_5f938742a6941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f97eac451fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5f9019d893c32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f8c8d8f39fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_5f9244307690a.pdfIn PDF document text
    • https://votawaxamudogop.weebly.com/uploads/1/3/4/4/134400347/5882540.pdfIn PDF document text
    • https://wojeribexojuxu.weebly.com/uploads/1/3/1/8/131856158/bagurigovig_nufewufapupimu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/40919595522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4500/6743/files/gajumuxadoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a40487e-f6c8-46b9-bbdb-fbb0c26a9597/tupevanasevirajuxele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9cf33f8-fc5a-4bc2-ad8b-98939fd27676/30001201976.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5d6af8-abaa-40e9-9ec0-056e434555dc/fallout_equestria_map.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 6872 bytes
SHA-256: 67e79166eab99d58c51b5605e0c69db1c2aa8670a9cd790b21b3c493144e1e5e
font_01_sfnt_off000079a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A8 5412 bytes
SHA-256: 8e9c697205dd697d40242d424c211f52c93e3b11ea6cdc11c7c3fe915b1ca8aa
font_02_sfnt_off00008bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD9 6044 bytes
SHA-256: da6e588b42139bcffc0979e29465d124a23fee0d3d38b0049771ed9c894ae9a2
font_03_sfnt_off00009c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C97 11352 bytes
SHA-256: f942e8af3d190c739966feb68619a769d6a22f16e62a6cb648bcba98aede836c
font_04_sfnt_off0000c291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC291 21128 bytes
SHA-256: 44e1b2015a9704f26cc2abc638036131dac498f2949863705a681816d19af259