Malicious PDF — malware analysis report

Static analysis result for SHA-256 99718444ca41ad67…

MALICIOUS

PDF

52.9 KB Created: 2020-08-01 04:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9f8caf08725faa1a266827163a3ab6d2 SHA-1: 58405e308ba6c985cdc4334fd45887be7dec89a5 SHA-256: 99718444ca41ad67b55fd910d3cea3543487f17a709c2c3244f6160845c61a9d
194 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lead users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector is a high-confidence indicator of malicious intent.

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.ru/pify?keyword=cat+banner+minecraft In PDF document text
    • http://files.mtvernonpentecostal.com/uploads/1/3/1/6/131636737/nexub.pdfIn PDF document text
    • http://files.ideadokan.jp/uploads/1/3/1/4/131407233/9323100.pdfIn PDF document text
    • http://files.codsallhistory.com/uploads/1/3/0/7/130775011/ganewezexix.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/1/0428/7656/7711/files/56986366959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/198506731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/a_course_in_combinatorics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/69280414896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6394/3067/files/96119661501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4025/files/felapagavojeselepepu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/22028824659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7490/3452/files/63913429018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/widazuxejesemunevu.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 3

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_off00009285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9285 4860 bytes
SHA-256: 330f7ef4d310bb41935d03f63376a32ea65288f18f88a0cea65946cfebb65832
font_01_sfnt_off0000a2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F7 10668 bytes
SHA-256: f63da2793fb8ce3ba249f8ce629aca00081633629c39c79e41697def312cbc10

Open this report in the interactive analyzer, or submit your own file for analysis.