Malicious PDF — malware analysis report

Static analysis result for SHA-256 83440f00fae5dded…

MALICIOUS

PDF

45.4 KB Created: 2020-08-24 00:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39899cc21d751ee5a2ee3377cac4a1e9 SHA-1: 6da2ee652927e02d423b2c406b6719bb2f4620b3 SHA-256: 83440f00fae5ddedc61552b010cbdd4011f10b47d920a30969102ff3b261f107
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as a Windows update prompt, directing users to a redirector URL. This redirector then likely leads to a malicious payload or phishing page. The presence of multiple PDF links and a redirector suggests a phishing or malware distribution campaign.

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.cc/pify?keyword=update+windows+10+pro+manually In PDF document text
    • http://files.pederistad.no/uploads/1/3/0/7/130739379/6470286.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41732402988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/volap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3383/7219/files/jitonaxigimusif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4764/8406/files/niduvadozegoluporel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9480/1568/files/65919526700.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65028435792.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/5842/0901/files/vowitejika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/xozetomufisatojobinutu.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 5

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 5368 bytes
SHA-256: 3fd392f9ba76e21b6fbce6e7cfe784b24be1ddc0c43d3421e3d0a74f3e0a3902
font_01_sfnt_off000077d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77D7 10296 bytes
SHA-256: f1b2282a399cd42213f31283778116818002bb911bf8704e6a6cdc7f782e1432
font_02_sfnt_off00009b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B16 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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