Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8cf26035a6598d2…

MALICIOUS

PDF

44.3 KB Created: 2020-08-09 09:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ea3992dd9c6a3f01dfba92f25033b2c SHA-1: f2e7dea56a077e7b1b69ba8729dfeadf15a165af SHA-256: e8cf26035a6598d2be9da1b331b68cc95d738b92c3fff8bdd62b59bb15a23de2
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The PDF file contains a significant number of embedded URLs, many of which are linked to a link farm strategy, with one URL identified as a malicious redirector. The presence of a 'LOLBin run command' heuristic suggests that the document may also contain instructions for executing commands on the system. The document body contains text related to 'Aparatos de ortodoncia infantil pdf' and references wkhtmltopdf, indicating a potential lure or disguise for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=aparatos+de+ortodoncia+infantil+pdf In PDF document text
    • http://files.wildandfreewellness.org/uploads/1/3/1/4/131453256/dawuvazosaxuvesu.pdfIn PDF document text
    • http://files.womencliniccentre.com/uploads/1/3/0/8/130813696/bijovigisezuramazo.pdfIn PDF document text
    • http://fazoke.everettdefense.com/uploads/1/3/0/9/130969060/wesulorujigevijilafu.pdfIn PDF document text
    • http://files.dmdesignsoc.com/uploads/1/3/2/6/132681884/lenubinevumevolizib.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/1/0430/9575/2864/files/cmd_serial_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/69215169139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6990/6844/files/wozatoxakuluvuzuvew.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/gitofoxapenupalesitakoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/sean_paul_temperature_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/xamumiforoxok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/37956614263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vabagibad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6704/7077/files/marezunogujuwunawuz.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://cdn.shopify.com/s/files/1/0430In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 5140 bytes
SHA-256: d2ab4c5beb519bd313383ed8d39e785d64aab47f867cfcc2a7bb475cc2125e34
font_01_sfnt_off00007f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 10948 bytes
SHA-256: 9ccf1b954ec931decc704c8bd614b5aca058161a761c935494ca77ab659d9206