Malicious PDF — malware analysis report

Static analysis result for SHA-256 067d5c5644434a2b…

MALICIOUS

PDF

37.6 KB Created: 2020-10-07 22:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e19a2a194f7fa551331276f02070979d SHA-1: d91b6c8d4f9b74aea502e6ceb7e678d763e3f89c SHA-256: 067d5c5644434a2b38675cae95c2e5c1c96f8c79b123ab986cc22e7d92eecc56
154 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to domains designed to host PDF files, indicating a link farm for SEO manipulation or malware distribution. One critical heuristic identified a link to known malicious redirector infrastructure, specifically `https://ttraff.link/pify?keyword=starting+strength+basic+barbell+training+3rd+edition+pdf+download`. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect users to malicious 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.link/pify?keyword=starting+strength+basic+barbell+training+3rd+edition+pdf+download In PDF document text
    • http://files.historymatters365.com/uploads/1/3/2/6/132681698/somadakunagolaf.pdfIn PDF document text
    • http://files.tinealllove.com/uploads/1/3/1/1/131163854/971be638bf3edf.pdfIn PDF document text
    • http://bamokud.msjonline.com.au/uploads/1/3/1/6/131607919/lejen_tedegoruko_damezuzegof_jezubim.pdfIn PDF document text
    • http://timuwix.santacasafertilitycare.com/uploads/1/3/0/7/130739873/33708.pdfIn PDF document text
    • http://files.gkovar.com/uploads/1/3/1/4/131452840/tevakisi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d009cb6-0eee-4dbd-b49d-2e9602ba20b2/52882408974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3648/7061/files/tofujuwow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8470/5699/files/palomutonolamipi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dd0b9f2-4ff8-4c6d-b812-693bd55119cc/34634213086.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8673a408-fe79-4438-94d5-0daaa11853ed/36845214052.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_off0000540c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 5916 bytes
SHA-256: 1034ef199eb4ddae1feedf1a46c2f5b73c9bd4954caf9b57ee5ad6a657c7d8e2
font_01_sfnt_off00006836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 9660 bytes
SHA-256: da1e9e7102c43c007eb955ad3214c3d0c13770ab7e77ec169786cd0276b8c852

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