Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8e6987e8ab5fe4…

MALICIOUS

PDF

43.6 KB Created: 2020-11-01 23:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 47cd2e513f1a0e917989cda89a0ab2a9 SHA-1: 1985bdf92e877da7c3f13549c4d33547b2554931 SHA-256: 2f8e6987e8ab5fe4a959801f805bcfa10350bb629178d9546c3a32f29d50a9c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. This suggests a link farm or phishing attempt designed to direct users to malicious sites. The ML classifier also 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://ttraff.link/123?keyword=vector+to+char+array+c%252B%252B In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446647/normal_5f9e03c67fddd.pdfIn PDF document text
    • https://bugukafu.weebly.com/uploads/1/3/4/4/134490359/bodufet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f8c49be1ed0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8a22247f732.pdfIn PDF document text
    • https://xoxebugifujame.weebly.com/uploads/1/3/4/4/134478015/5682956.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_5f9cbce151eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f98dbc307c8a.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/1/0480/7435/8948/files/niwojakivukaninubuluni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43dc8d99-2728-4b90-9028-983cebad443f/7556401532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/3815/2133/files/jeep_grand_cherokee_2020_limited_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9337/0032/files/teduloxanidejogodumugofif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2647/8768/files/gidisudamupupukamuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1006/4036/files/keutamaan_surat_al_ikhlas.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_off000069b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B7 4744 bytes
SHA-256: 6e5ff4f0d3474905f5e6b36e4610569aea9d8e2916c03029ae291ed2278ffea0
font_01_sfnt_off000079dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79DD 11724 bytes
SHA-256: 2bfd5eff30bb52cb0acbd89a7c3fa84ea542b6265d7c1ec7914c9b569f8cc1c2

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