Malicious PDF — malware analysis report

Static analysis result for SHA-256 d995e4cafa2ab394…

MALICIOUS

PDF

41.3 KB Created: 2020-08-19 14:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f60a15aedb9fcbde56fb1175fb336a3b SHA-1: 3da03ded7713a6e102a8b4b4372bf4d7bf84b55a SHA-256: d995e4cafa2ab3947e5dab4fea5e247fd152c879938e179b5f00e8f4cca48231
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with one identified as a malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the document's primary purpose is to distribute links, potentially for SEO manipulation or to lead users to malicious sites. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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=asap+medium+font In PDF document text
    • http://files.elevenbees.com/uploads/1/3/2/8/132815872/vuvixisedesotam.pdfIn PDF document text
    • http://files.busenerpro.com/uploads/1/3/1/8/131856476/7778920.pdfIn PDF document text
    • http://files.therealneverdie.net/uploads/1/3/1/3/131398419/2bd1eb.pdfIn PDF document text
    • http://mabuno.lebonearchitects.com/uploads/1/3/0/8/130814328/jovikukupovebebem.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/1/0429/5727/5299/files/koxopipovin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/basic_english_grammar_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/vavofutamexuzitomuviro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1175/8491/files/61471424518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/tumelotuxomixiselepira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/22781694581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/darunotugavapu.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 6

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_off00006045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6045 5048 bytes
SHA-256: 8a1d29eedb66fa3593d5e00ad82e23536ac90a1ccb5e6d122924bfb24f4ea49c
font_01_sfnt_off00007165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7165 11900 bytes
SHA-256: ea1c6ec84ba6ed0c63cf31af7acffe28700690eadacf0d9464da56d272910715

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