Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbd2b1558393e03…

MALICIOUS

PDF

48.1 KB Created: 2020-08-25 04:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51402df90c0cb4fb5517a4e3d2dd4d70 SHA-1: cd6306f19f9db1aaf1407947bbdac366190f71ac SHA-256: 7dbd2b1558393e031508214f80f585feb4e78be9574057bb140a6408d1c9b33b
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious redirector, which in turn leads to a farm of other PDFs. This suggests a phishing or scam attempt, likely delivered as a spearphishing attachment. The document body, though heavily obfuscated, contains the URL that initiates the redirection chain.

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=template+expense+claim+form In PDF document text
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdfIn PDF document text
    • http://nunoba.fcsirocco.org/uploads/1/3/0/7/130775853/cd071fa1b3.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/1/0428/2885/7503/files/clinical_chemistry_bishop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/37066664761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/artificial_intelligence_and_the_future_of_warfare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2838/5690/files/jolat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/dobotudaletuxudak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/6839747312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6550/2872/files/acuerdos_de_paz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/goxikinopenimene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/computer_science_for_competitive_exams.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_off00006e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E86 5176 bytes
SHA-256: 5e958bd01f16c341520a54c6171de60e184b7995bc67a991d86c02750f6159d0
font_01_sfnt_off0000800d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800D 15988 bytes
SHA-256: 73f1eeb0aa8d68c88362750f075e5b3302f46e9bf8de2b9ca569692843cb1d9e

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