Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a23fa057816758…

MALICIOUS

PDF

35.8 KB Created: 2020-09-19 07:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 509711f4a47dd079c155be82ab080340 SHA-1: d77014ee33b62ad5943cfbe2ed684689434fc029 SHA-256: 22a23fa057816758e9c55ac186a6cfe457a9d61a5fdeadbd708c5e3235cd7d7a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to external PDF files. One critical heuristic indicates a malicious redirector link, and another identifies a link farm likely used for SEO manipulation or to distribute further malicious content. The document body contains obfuscated text and a URL that appears to be part of the link farm.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.club/wix?keyword=teak+lectern+osrs In PDF document text
    • http://fepuwijo.auroramay.ca/uploads/1/3/1/3/131379685/117c8b97.pdfIn PDF document text
    • http://files.kristindahlhomeloans.com/uploads/1/3/2/6/132695668/ziwituwesuxofiruf.pdfIn PDF document text
    • http://mimup.bankslaneinfants.org.uk/uploads/1/3/2/6/132695629/doragidobu_lumosusawabe_fugolelunazono.pdfIn PDF document text
    • http://files.dramaaroundtheglobe.com/uploads/1/3/0/9/130969761/4681863.pdfIn PDF document text
    • http://xejuxad.renwickpark.com/uploads/1/3/1/3/131379070/vibagigudorisukumere.pdfIn PDF document text
    • http://files.living-practically.com/uploads/1/3/1/4/131406344/40b4b758f273.pdfIn PDF document text
    • http://files.lakeforestcondoassn.com/uploads/1/3/0/9/130969980/zizudefat.pdfIn PDF document text
    • http://fexano.belliesandbundle.com/uploads/1/3/1/4/131453247/3899347.pdfIn PDF document text
    • http://files.mjratts.com/uploads/1/3/1/6/131636833/8551689.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/1/0429/7408/5279/files/1471904272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/jetufik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/siwamejupamit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8933/7256/files/google_analytics_academy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6072/7703/files/rocket_propulsion_book.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_off00004f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5A 4808 bytes
SHA-256: 818879a7dc7403ce507a0e22b6d62303ccef4bccb711ab1002c49da143620306
font_01_sfnt_off00005fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBE 10244 bytes
SHA-256: 7792d5b1ecbc7331abe0cece20123f0679c4b15e7da99f084219539f8fad53d3

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