Malicious PDF — malware analysis report

Static analysis result for SHA-256 872ffbbb70ab1299…

MALICIOUS

PDF

49.2 KB Created: 2020-08-23 00:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a93b3d5a13329b4fc03f55475a3861b SHA-1: 847f6882f4141bcf27fd952bb8d00d560e519ea7 SHA-256: 872ffbbb70ab129963b53d64f9f55186ed2c91f1331dc8daa9fd79e51c3ab757
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to a malicious domain, disguised as a software download lure. The ML classifier strongly indicated maliciousness, and the heuristics identified the document as a redirector link and part of an SEO link farm. The embedded URL points to a known malicious redirector.

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=dreamweaver+latest+version+for+windows+7 In PDF document text
    • http://files.mrstuckeysclass.com/uploads/1/3/0/7/130776841/4143467.pdfIn PDF document text
    • http://nusovuza.weatherpaige.com/uploads/1/3/1/1/131163774/tufexi_lekifewukele.pdfIn PDF document text
    • http://jebibajaz.octaviaharris.com/uploads/1/3/1/4/131453119/liwazovi.pdfIn PDF document text
    • http://munubeso.inspirefineartcenter.org/uploads/1/3/1/8/131856622/sulibubidematoj.pdfIn PDF document text
    • http://files.msfoegler.com/uploads/1/3/0/7/130776619/182943.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/1/0428/0313/4627/files/34995645872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3985/7572/files/89572637226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/engine_bearing_failure_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/98006587451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6278/8245/files/26139375977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1140/files/nudagobasabuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/40526823499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6342/8516/files/costain_group_annual_report_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9875/8557/files/82145330390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/5527152520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/iia_standards_audit_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/jekafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/cold_rolled_sheet_steel_properties.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_off00008089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8089 5284 bytes
SHA-256: 10d8a12da1885db786c6810bdbb182e8d530c449cdd237f2d3fc805db3f63818
font_01_sfnt_off00009289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9289 10744 bytes
SHA-256: 178b935500f36e9d01ae36390cac208b32ffd23df24f29ec80235cdbffa75c48

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