Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d960e3cb8122257…

MALICIOUS

PDF

48.4 KB Created: 2020-08-01 09:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c35532e4c90c9cb4c3d04516c9db3bf9 SHA-1: 67372aec574d851dfa9ba0a84b12394c98c5a44f SHA-256: 3d960e3cb8122257a1d68bc4987e5b01a7b6a64bc3192075b9f8e5c842afad76
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware delivery site. The document body contains garbled text but also includes the primary malicious URL and several other PDF links, reinforcing the link farm and redirection attack pattern.

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.cc/pify?keyword=navi-+x+for+kodi In PDF document text
    • http://files.udrec.com/uploads/1/3/1/4/131482916/3256247.pdfIn PDF document text
    • http://files.authorseanmacuisdin.com/uploads/1/3/0/7/130740521/batemede_vidugerekon_gudoli.pdfIn PDF document text
    • http://files.rehobothconcertband.org/uploads/1/3/0/7/130775309/zireju.pdfIn PDF document text
    • http://files.learningforlittlepeoplepreschool.com/uploads/1/3/1/6/131606392/eb08ac245ae3ac.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/1/0429/1103/9655/files/xujijigajofuvilakures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67641838088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/68631003626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4134/1092/files/pabozibajol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/gezelepebodamugofaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3706/4344/files/xazugufagibefido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6410/6908/files/53383253308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/jutefaloxokijefavomimel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5596/2522/files/63929326116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5502/9141/files/vutuxanibamovexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/23210411968.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_off00007548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7548 4368 bytes
SHA-256: 1af03f56276b06083a5f412f630ce7a9779786012b23a69f73873a60c8cd9403
font_01_sfnt_off00008436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8436 10204 bytes
SHA-256: a6e9bd4af2cebb9f268123201a9dc88e8cf6bde0eb6d1007280ea219190971c9
font_02_sfnt_off0000a70d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA70D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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