Malicious PDF — malware analysis report

Static analysis result for SHA-256 836f18e6f7dfde6c…

MALICIOUS

PDF

40.5 KB Created: 2020-09-11 13:11:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e57d0767df2de07ba6fe9c75774cdb76 SHA-1: 8e1dcb6a55df8c065d7cdb96d70b4c7cb6e0a659 SHA-256: 836f18e6f7dfde6ceb75eec357d5f896e10c95f0112f01a91cf31a56b9d6cdfc
194 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to appear as a link farm for SEO purposes, but they ultimately redirect to malicious infrastructure. The primary redirector URL is identified as malicious, indicating a phishing or scam attempt. The document body, though partially corrupted, contains text related to 'Children's aid society toronto reporting' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious links.

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.me/wix?keyword=children%2527+s+aid+society+toronto+reporting In PDF document text
    • http://nimolo.barefoottofino.com/uploads/1/3/2/7/132741009/8569925.pdfIn PDF document text
    • http://files.thesourcemassage.com/uploads/1/3/1/4/131438500/lebuk_vulidagibad.pdfIn PDF document text
    • http://files.foliagewoodcarving.com/uploads/1/3/1/4/131454670/birekexujijugaz.pdfIn PDF document text
    • http://files.jogscotland-aberdeen.org/uploads/1/3/2/7/132740449/zemifelediruz.pdfIn PDF document text
    • http://liluvonog.imperialbathtreats.com/uploads/1/3/1/1/131164250/jipirixitonu.pdfIn PDF document text
    • http://notaluzo.serafinarosen.com/uploads/1/3/0/9/130969341/051f869a1831c4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/cf14a4_7f64c70c449e46deba55ed001c86879c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3be500aae3ec4f30908e389f6d583f57.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4f270c_3c7062d425334d9d801720a9b664ba35.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0b46e6_fc1ef5aa28274b8db1227061e11daed3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/77941b_bdd95ff8b84c4dc3aa02c596f041fc84.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bc0b97_1726230d83a94cd9a23773a7ea018f2d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/89c6ad_963090a0eccb4cbe82bbe2fa35b99c0f.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6151 5376 bytes
SHA-256: cba72d059d3bf622ab730e20f99cc2b4cf86e2abb7ff5500301fd860ea3a12d4
font_01_sfnt_off00007399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 9816 bytes
SHA-256: 53fe7b251cff78eaa17e1924996afc44e10c773d51db1888feb65318746bf3c0

Open this report in the interactive analyzer, or submit your own file for analysis.