Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c8514e5569fb03…

MALICIOUS

PDF

44.2 KB Created: 2020-08-06 03:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4beed1d7925f0bd82ef933bccd35c7e SHA-1: 71ccff942c3833b3a50ecb0b85786daa57f4bcb0 SHA-256: 73c8514e5569fb037d0b314387e3388c560a7d0cbae148d5ec6899c5e9a27d6c
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one that redirects to a known malicious infrastructure at `https://ttraff.ru/pify?keyword=basics+of+computer+and+applications+book+pdf`. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=basics+of+computer+and+applications+book+pdf In PDF document text
    • http://zelonu.arkansasbearcreekgoldensanddoodles.com/uploads/1/3/2/3/132302872/3801665.pdfIn PDF document text
    • http://files.abiyoga.com/uploads/1/3/1/3/131397987/kenanupagavumut-dukamodukevawe-nifirusibo.pdfIn PDF document text
    • http://files.birchbarkfarms.com/uploads/1/3/1/4/131483098/326163903.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/1/0437/7473/8581/files/24864200489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/hands_on_automated_machine_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/atrial_septal_defect_pediatric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5559/5172/files/kukebogozufifolaluteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/pijobiraviwesuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71409998288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/ratio_analysis_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2665/3077/files/powevidepib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8131/0114/files/50404342366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/71854062357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/lututelusujutejap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/8465691018.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_off00006dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCA 5552 bytes
SHA-256: d8591da829e635b2a62b5ce2ce15a65e971a7db9545dc88848319bd507a2fcf6
font_01_sfnt_off00008094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8094 10272 bytes
SHA-256: 6762d979b4353f8eaa95923d0a4d459dd8d888e40784923b7c37d6ff0974bc49

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