Malicious PDF — malware analysis report

Static analysis result for SHA-256 1828ee59a28051a7…

MALICIOUS

PDF

42.4 KB Created: 2020-08-07 21:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ebb61c63333027eb87381db3bf09379f SHA-1: 7d7ea7181aef2091ad1914840a52f345fe6d67ea SHA-256: 1828ee59a28051a7ca060278a15dbb04c59b647d58d0eb4a09e7ccece6683fb5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

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=jointer+machine+pdf In PDF document text
    • http://files.cebuanohomes.com/uploads/1/3/0/8/130814329/nivezasuri-mopuka-sajigivesujegi-folekapus.pdfIn PDF document text
    • http://files.upwellings.com/uploads/1/3/1/6/131607174/c3eb020e.pdfIn PDF document text
    • http://ritalofun.leiden-united.com/uploads/1/3/1/6/131636725/5264400.pdfIn PDF document text
    • http://files.derekcovingtonsmith.com/uploads/1/3/0/7/130738568/bufavijifowir.pdfIn PDF document text
    • http://files.gillettehandyman.com/uploads/1/3/1/4/131406434/fupesewujerisap.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/1/0433/8286/6083/files/14995865653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/rubitidigukidufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5774/0967/files/spelling_test_for_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4610/8312/files/mewevukovugarulexid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4390/3905/files/juselasemobimetolapux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/mokijevajuxelovafojete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9083/6645/files/gisubiveretewezuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/sidamogezoxuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/glossary_of_computer_science_terms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0089/7440/files/84811070263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/ponisuwarategoxufurugavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/john_deere_plow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/97230969069.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 8

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_off000069e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E4 5176 bytes
SHA-256: e14bd791b058872a4107b7d8590332aeb622d1f0b9424e6496c835c6821ea262
font_01_sfnt_off00007b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B55 9724 bytes
SHA-256: 823c55420f592b12ed0b6550cc4b449b201a5d245484046160e15eec9514d012

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