Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ca00825ac7a654…

MALICIOUS

PDF

41.7 KB Created: 2020-08-23 10:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 651c6158e057e8595147754e0c8e6354 SHA-1: 1695f83a4240746970fa050e58eeb883fb318333 SHA-256: b9ca00825ac7a654b027d3b2d48a7cc3aed430157ec66d1655beeee7e7bede68
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body text and embedded URLs suggest a lure to download an app, but the primary link redirects to a known malicious domain. The presence of a link farm heuristic further indicates a malicious intent to drive traffic to potentially harmful sites.

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=best+brightness+control+app+android In PDF document text
    • http://files.solivitarvclub.com/uploads/1/3/0/7/130738918/giwulap.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/1/0430/0367/4785/files/autonomous_system_for_differential_equations.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/16790667641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/nationalism_and_ethnic_conflict.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/palmistry_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2853/6731/files/davisimulagikujagik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1822/1728/files/7643768241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/51984458410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/weatherbeeta_fly_sheet_neck_cover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2758/5430/files/80306401341.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 1

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_off0000659f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 5524 bytes
SHA-256: bd29272c9228fa28e752b5a2f371cefd7e5132655d03ccc642f0fb8454cbcdda
font_01_sfnt_off00007854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7854 9952 bytes
SHA-256: d157e469b5854f9190925e6b5990f49f381816d7d5da424b0eb25870e27d7566

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