Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f73d97e25852760…

MALICIOUS

PDF

42.9 KB Created: 2020-08-05 08:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e86a959268f58a9e5384320475359d8c SHA-1: 19344b9b5ef14e769923badd4b6902a5c1ac5eda SHA-256: 7f73d97e258527607eb516efb9f25c3ae9fb3307c2d0b0e2f63b61899a56ea6e
194 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to a redirector service known for malicious activity. The document's content, while appearing to be a worksheet, is a lure to encourage users to click these links. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a link farm designed to distribute malware or phishing content.

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=preschool+all+about+me+worksheet+pdf In PDF document text
    • http://files.aliromanow.com/uploads/1/3/1/4/131452811/3d3c15999d21.pdfIn PDF document text
    • http://files.umweltschutzverein.de/uploads/1/3/1/4/131438059/tatiraridolome.pdfIn PDF document text
    • http://files.rockabuybaby.shop/uploads/1/3/0/8/130874594/bilufupebewa.pdfIn PDF document text
    • http://files.thanksforeverything.shop/uploads/1/3/1/3/131398091/8095537.pdfIn PDF document text
    • http://files.mindyschaper.com/uploads/1/3/1/8/131856271/cb206202fa7.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/1/0430/8454/6209/files/addie_emoji_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/vikusituluvam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/demenajejowegute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/57095951779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0722/0644/files/97722020347.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/dimopamimoburu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/mubimazikameduduraluzizo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5109/0071/files/gapezagaxiralere.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/vevijagaxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/61441887655.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 7

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_off0000688c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688C 5692 bytes
SHA-256: 58e90c98dea3ae68fdab2a20d4ab3a461e14c8112cd2ae7ff51ad61865c02cf8
font_01_sfnt_off00007bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCD 10180 bytes
SHA-256: 7d9a936f4c608a2ba2995fd93fcbdaa3ea6ec69269cd8761f1f189c526488294

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