Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf81913bff4e693…

MALICIOUS

PDF

44.5 KB Created: 2020-08-08 05:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aba0b2d734b364eb381d25f52714302b SHA-1: 4020032cecd6f1c121753d4731becf553427dc94 SHA-256: 0cf81913bff4e6931fe08013bfa77e3a675c68be7fc7c03f062a4752cd66e3ed
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body text, though partially corrupted, includes a URL that appears to be a lure for downloading a PDF, likely a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of redirector links supports a malicious intent to lead the user to a harmful site.

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=research+paper+abstract+example+pdf In PDF document text
    • http://files.thelotuscenterga.com/uploads/1/3/0/8/130814032/de9b1545314d147.pdfIn PDF document text
    • http://files.nevisatnight.com/uploads/1/3/1/3/131398605/e07e12685f.pdfIn PDF document text
    • http://files.stmichaelsnorman.org/uploads/1/3/1/8/131856491/482f6e4cc4198f4.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/1/0431/4857/4884/files/mosoborejuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2123/6386/files/55256839148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3516/2784/files/tukowugox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5071/files/98976650958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3341/9166/files/zawumugalovifakejigesus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/bakalitamisotogidetif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/1021282056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/kejaxop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/1300847257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/rujomosoribaxejugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7951/4777/files/valelarilogajuxanonemewam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/doxufuvezemog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/functionalist_perspective_on_crime.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 2

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_off00006e41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E41 5612 bytes
SHA-256: 002af593d2bf80b17a1a83214e1ddc8471357bdfd27198cd12dcc0aadd78476f
font_01_sfnt_off0000812f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812F 10520 bytes
SHA-256: 76edcd27e6f02a8cd5a95aa97795c726cd9e54926a5bafcaa1162428851b4481

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