Malicious PDF — malware analysis report

Static analysis result for SHA-256 86110f31ac9ac0db…

MALICIOUS

PDF

39.0 KB Created: 2020-08-29 11:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a4f567014e596444e5f74df7c5e9361 SHA-1: 3ab17755226d702790262743c01c20921ece5c32 SHA-256: 86110f31ac9ac0db5151d0ff1b3e3092028e57c0738ca77fc63e6ccd55713965
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains a URL that points to a redirector. The presence of a 'download button' lure and a 'clipboard command execution lure' suggests an attempt to trick the user into executing a payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=nifskope+skyrim+special+edition In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6ba75142c7ae4212aef37ea6fb412455.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b3790cfcef234d76893c26ee38e8193e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f0c51820f48f492b9c12623f66e317ae.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cbe70f2f25074dabbed2f35ee81cf7bc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/zatidovuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/belfast_city_airport_flight_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/34278418708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1518/3002/files/57222666051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/basecamp_2_all_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/office_telemetry_agent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1438/8888/files/78752182660.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d60ebab9554d4247b20a0034793baf23.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5f4690af8743433699ead449f78db290.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_off000057a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A8 5436 bytes
SHA-256: ebb8f13d84ec1baea4fe6af864af180168b10e8ea7df795156853a6dbca2bbfa
font_01_sfnt_off00006a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1B 10968 bytes
SHA-256: 7806fb39b67eaa5d6f72b42e1f170b3b90746c199d651b37b289a98ac04aef63

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