Malicious PDF — malware analysis report

Static analysis result for SHA-256 f876affda6ca20cc…

MALICIOUS

PDF

44.8 KB Created: 2020-08-02 08:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aef74ed6fa1ec61f41c5054f4a025ff2 SHA-1: e244d97047308d77a316078104d41c881f2a04e8 SHA-256: f876affda6ca20cc9f7a800b1fd86c8794ca078edda13f908aac25527761ee04
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as firmware downgrade information. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious URL is https://ttraff.cc/pify?keyword=tm-+ac1900+firmware+downgrade, which is a known malicious redirector. The presence of a visual download button lure further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.cc/pify?keyword=tm-+ac1900+firmware+downgrade In PDF document text
    • http://files.amandaknight-bardsley.com/uploads/1/3/0/7/130776309/nupadoninozinure.pdfIn PDF document text
    • http://files.classicaldigitalphotography.co.uk/uploads/1/3/0/8/130813732/84303f4d37.pdfIn PDF document text
    • http://files.ionamccuaig.co.uk/uploads/1/3/1/1/131163867/nukege.pdfIn PDF document text
    • http://files.texasgulfrecord.org/uploads/1/3/1/6/131636941/72c12e77117976.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/1/0430/5793/8581/files/87495835592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/gaminedaku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4613/2129/files/vetozetupulawegipikof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/77496931433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3137/9619/files/83207739762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/vepixuzexamixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/gerotaseku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/56675453190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/nugunoragopudazudaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3782/4926/files/95845545582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0402/5243/files/tyler_the_creator_jamba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/dorugew.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
🗂 Part of campaign: ionamccuaig.co.uk 3 samples

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_off00006e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3A 5556 bytes
SHA-256: 2aa30cbb54e655a4645f7deb8d6c7b007829c7c6f368b7f2a9534ae8fa9535e6
font_01_sfnt_off00008126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 11056 bytes
SHA-256: 855f812f7f9bd99f81f33c6c995ee423e106104066d211c069814064f24ae009

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