Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7dd423bf90a533d…

MALICIOUS

PDF

40.6 KB Created: 2020-08-06 14:10:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66457b17c9459ee4b22a8773b366e83e SHA-1: 680c50b5860584be17949f6b79d7159b0fc9e97d SHA-256: a7dd423bf90a533db59fff9ac9cff79049c4bf4b62cf57fadab65b030050b9fc
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector. This suggests the document's primary purpose is to redirect the user to a malicious site, likely for further exploitation or phishing.

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.com/pify?keyword=stative+and+action+verbs+list+pdf In PDF document text
    • http://files.myfaithonfire.com/uploads/1/3/1/6/131637309/64794.pdfIn PDF document text
    • http://jufusexab.elilanguagemagazines.com/uploads/1/3/1/0/131070767/nujadotoramul.pdfIn PDF document text
    • http://files.daventrydogtrainingclub.com/uploads/1/3/0/8/130873973/6745225.pdfIn PDF document text
    • http://files.smithsstationruritan.com/uploads/1/3/0/7/130739308/mirawux.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/1/0430/7877/9029/files/tugofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/bibatudopegumufupavas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7381/4182/files/mutawowosisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2523/files/13289316672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/52688346201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9706/2564/files/5908657189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/61723846441.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3672/8726/files/gapusafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0544/2209/files/novoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.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_off000060f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F0 5452 bytes
SHA-256: 72904d541fd3ce34f9c8e971cd0d7174969145bc6efbe7212b4790cb9e593957
font_01_sfnt_off00007387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7387 10052 bytes
SHA-256: 3d9eb46b448dc8b9792cd4ef2b0457e4f4f534d385e06f8299f56878e7f9a086

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