Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b23379aaf47b755…

MALICIOUS

PDF

36.7 KB Created: 2020-08-04 21:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bf54d0e4c14256d00f1b9a0bbb79d66c SHA-1: 1a3de6feb4f2cc98df139b2de917718a7ad7476d SHA-256: 9b23379aaf47b755bf93dda9474a711dc2a3ac02e409d830a707efe763638bd2
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'manual for ring doorbell 2'. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to external sites, likely for further exploitation or phishing. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=manual%20for%20ring%20doorbell%202 In PDF document text
    • http://files.paraglidinginkorea.com/uploads/1/3/1/4/131437330/6514853.pdfIn PDF document text
    • http://files.maltiel.com/uploads/1/3/0/7/130738639/wuwafipum-lukofifafe.pdfIn PDF document text
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdfIn PDF document text
    • http://files.oasischurchaiken.com/uploads/1/3/1/4/131437806/284894.pdfIn PDF document text
    • http://files.sacredheartjc.org/uploads/1/3/1/4/131453214/wasajur.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/1/0433/9915/1768/files/gosixevibuxovenum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7533/8391/files/39807382013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/60352233043.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/57501166151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/molodoladukudotidufakar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/mapoxatumojozazijepiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8560/1695/files/nozapekupobip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3192/8730/files/88990550639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/rilowujokik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/mini_budget_2020_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9505/5777/files/50641341159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/household_budget_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/26540091055.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_off000051f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F0 5176 bytes
SHA-256: cbd57676f4ae9f60751c4abba38a0b4dff4851e884f24429d976afee6a3581c4
font_01_sfnt_off000063a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A8 10084 bytes
SHA-256: 7dc4ba9a119d793816728971a9bc799633ad7e93a37f9022cf19936e34117c3b

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