Malicious PDF — malware analysis report

Static analysis result for SHA-256 1835447bde4e4e65…

MALICIOUS

PDF

40.8 KB Created: 2020-08-08 12:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7d9c56e71d4c2580658453e6da58016 SHA-1: afb1337d17c68d31d0977b7400e3c3511193fdba SHA-256: 1835447bde4e4e65f4ba39438e9b4cbb66ef0c1cd65e21a9d7c64a7789bc796f
194 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to appear as a solutions manual, redirecting users to a malicious site. The ML classifier strongly indicates maliciousness, and the embedded URLs point to known redirector infrastructure. The document body itself is heavily obfuscated but contains the primary redirector URL.

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.com/wb?keyword=student%20solutions%20manual%20for%20operations%20research%20applications%20and%20algorithms In PDF document text
    • http://files.thewnewesterner.com/uploads/1/3/1/4/131407493/1cd7dfd6d.pdfIn PDF document text
    • http://files.levental-lab.com/uploads/1/3/0/7/130775241/zukajilaxokaje.pdfIn PDF document text
    • http://gowefag.vmnshenandoah.org/uploads/1/3/1/4/131483281/7391856.pdfIn PDF document text
    • http://files.vandailyblues.com/uploads/1/3/2/6/132695248/bewibijorilema-tusevolimiz-vijerugeb-juzixuxe.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/1/0431/6997/2392/files/badorepuwubatusibeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/atomic_habits_by_james_clear.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/number_recognition_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1038/1208/files/almonard_fans_price_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/gogowoxibuzipudedebemenez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9888/0680/files/93287853456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/koxigazupijorawumupuder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/dopokisak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/xarixujolakafimoxapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1551/0938/files/glasses_case_pattern.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/completing_the_square_practice_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6521/1035/files/joruvidexixe.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 3

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_off00005d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D46 5672 bytes
SHA-256: 5550b2d05f160e8f03c5d1dc3928c1784730c0ccf088d019ca390b7c95bb8e3b
font_01_sfnt_off00007063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 10840 bytes
SHA-256: f483a1c2787b8560e4597ea84486280d533fbd11314fde6c1aa26bca30fa50f5

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