Malicious PDF — malware analysis report

Static analysis result for SHA-256 40377d5a630bd186…

MALICIOUS

PDF

114.6 KB Created: 2020-08-02 22:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2818f44666eafc4f3d8263dee97f10a6 SHA-1: 06f7004f8025825d78ea4c5f2b7838438befe39d SHA-256: 40377d5a630bd1865e2413d24655376e3ba6ff2db30c234c237214d02db1907c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a known malicious domain, likely intended to deliver a payload or phish for credentials. The document body, though heavily obfuscated, contains the same URL. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to attract clicks.

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=do%20while%20loop%20in%20c++%20pdf In PDF document text
    • http://files.shopserendipitystyles.com/uploads/1/3/1/8/131856446/xibaradedagodedev.pdfIn PDF document text
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdfIn PDF document text
    • http://files.gunmess.com/uploads/1/3/1/4/131452821/mijonodoselejow.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/1/0432/0519/7985/files/xeporuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/91282570889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8281/files/38941932913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3028/files/50183264759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/ropixozejijunirasuwuzage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/resetofibosopozomuzifeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/sededaruvosemizum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58585016777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1931/3062/files/44665544971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2053/2386/files/xapukekijefirikafixugega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0280/5921/files/komewowemek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/76356939711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/zufejebumar.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_off000177c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177C0 4848 bytes
SHA-256: 306c95c629dfceaa682768422ec1b06860238f947b23eb49e9fa89884d91c36e
font_01_sfnt_off0001885c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1885C 16276 bytes
SHA-256: d1ce7ef3555693180b977c15462c5effe0ac5c3b184e1e1149870bb392785f19

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