Malicious PDF — malware analysis report

Static analysis result for SHA-256 7857c3d89cbca858…

MALICIOUS

PDF

47.2 KB Created: 2020-08-12 04:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f138575e6fa393cbfdf8f17203b218be SHA-1: e2a10d0c16e1fdba2292eee8593d49b863504fcc SHA-256: 7857c3d89cbca858d596bf68338bfa66a75ab49867efcdec9e9b1a4be2b7a969
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to redirector infrastructure, specifically identified as a link farm. The primary redirector URL is https://ttraff.ru/pify?keyword=benchmarking+notes+pdf, which is also present in the document body. This suggests a phishing or scam attempt to redirect users to potentially malicious content. No scripts were extracted, but the presence of many links and the ML classification strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=benchmarking+notes+pdf In PDF document text
    • http://files.madronacompany.com/uploads/1/3/1/4/131410736/gafidudanimetig.pdfIn PDF document text
    • http://files.hlleathercompany.com/uploads/1/3/2/7/132710717/3853406.pdfIn PDF document text
    • http://files.flowergirlkauai.com/uploads/1/3/2/6/132682338/vuxasigomu.pdfIn PDF document text
    • http://files.4lee.net/uploads/1/3/2/6/132680915/db86c39f.pdfIn PDF document text
    • http://files.swolfephotography.com/uploads/1/3/0/7/130774965/mobunoboxeren.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0451/0665/9493/files/pdf_markup_app_surface_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6982/3390/files/vapesazis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4519/9784/files/zawosovusuziwiruwunile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vejut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/55788778978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/mewevegazinerolek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/faferobobuwuzimoweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/ramefajovulafuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1340/5850/files/bugunidomad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99237037604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/advantages_of_lifi_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4424/9504/files/44972143631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5503/7093/files/valuwil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/pavev.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C4 1604 bytes
SHA-256: 2865e7baf948dad665c6444796ca384115bd4b2b4fd1fe86d29b5d3d3d6405bf
font_01_sfnt_off00007ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE7 5648 bytes
SHA-256: 4061ff9850cf9822f63e50575341ec304cbfb4cc914e0ce22f856319e1f578a4
font_02_sfnt_off00008de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE3 9796 bytes
SHA-256: 659bcf8e4fa6904c6924d47d9e963147aef5d5545a73e0324462d26f658ffa8e