Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c9b449a6ce177fd…

MALICIOUS

PDF

43.0 KB Created: 2020-08-17 02:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b9a893eba52a972c751e33021109483 SHA-1: 1772259e6177483a95d8ff99de5c340a4c03f836 SHA-256: 1c9b449a6ce177fdad44200f805421cd10e1efd2f27a0276c839391689684049
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 a driver download for 'amd a4- 9120 radeon r3'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link points to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic indicates the PDF is part of a larger link farm, suggesting a broad phishing or malware distribution campaign. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports the lure-based attack pattern.

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=driver+amd+a4-+9120+radeon+r3 In PDF document text
    • http://files.busedu.org/uploads/1/3/2/7/132711999/076e548b74.pdfIn PDF document text
    • http://files.carolynodoherty.com/uploads/1/3/0/7/130776168/7cee3b4f9e4b55b.pdfIn PDF document text
    • http://files.theharbourcc.ca/uploads/1/3/1/8/131856394/nonidupifuzog-rejux-panapi.pdfIn PDF document text
    • http://gaviz.servantsofthestreetsfwtc.com/uploads/1/3/1/3/131379951/gekelimaj.pdfIn PDF document text
    • http://files.boatdocksolutionguy.com/uploads/1/3/1/4/131407737/4049049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8508/6364/files/jekeravejat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1839/4527/files/light_feather_classic_wow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9151/5797/files/72291828844.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3905/4231/files/us_antitrust_law.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/83184333974.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5838/7349/files/fufategenopuzusiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/ipad_pro_pencil_markup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/jufebimolexi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B89 5292 bytes
SHA-256: a3b9bf9bbff1d6c76a0d83b44b4d55d68dc29361a61412d287cb41b64a0f8dc5
font_01_sfnt_off00006d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 10448 bytes
SHA-256: a25f68f7c08745326e428abb4aa341e8591b3c33846fb7eb1f0a83aa7651f6bd
font_02_sfnt_off00009137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9137 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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