Malicious PDF — malware analysis report

Static analysis result for SHA-256 9daca3f717066096…

MALICIOUS

PDF

45.4 KB Created: 2020-11-01 11:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 8723341382bcbbddcf12a209f84693c5 SHA-1: 2941f4c76b43e699aac3fd86ec4e0c470677c77e SHA-256: 9daca3f717066096e3195c80e5fefce560f11d8757fee784fe54e1f4d0f5cbcf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a "free psychic reading call" which redirects to the URL https://ggtraff.ru/aws?keyword=free+psychic+reading+call. This URL is flagged as a known malicious redirector. The document also contains a large number of embedded links to other PDFs, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness.

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://ggtraff.ru/aws?keyword=free+psychic+reading+call In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f87bbd087a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f9c84259a903.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_5f8e9ed67d057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370053/normal_5f8a69e895cc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f943c847d13d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409628/normal_5f954ceb705c4.pdfIn PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/gewemegaguzejularego.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/954920f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5f90a3d1ed92f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375884/normal_5f9b44970945c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/pizikuxetajewuk.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/gixefejoruxomewivajetol.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 5392 bytes
SHA-256: 0bba8ee654f708d29410e580bf0f64f3b6b466ba02fa5aeac7826079b7b66c14
font_01_sfnt_off0000854e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854E 10492 bytes
SHA-256: 05ca8b5e6ca6d1555a80d2991213753ab7766e99204ed87c80da9d90737c44b9

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