Malicious PDF — malware analysis report

Static analysis result for SHA-256 8476f68584c2c558…

MALICIOUS

PDF

37.8 KB Created: 2020-08-23 16:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0e8e4c8c5adfcc7fa466bd7b60823f1 SHA-1: c0bd10d5612f6213c522c931a08b8ad14d0d1e64 SHA-256: 8476f68584c2c558ab75eb0b249cde8d07a4ac50e4ca832f401706b303970ef5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains text suggesting it is a worksheet, likely a lure. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL confirms a high likelihood of a phishing or scam attempt.

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=solving+linear+equations+with+fractions+worksheet+kuta In PDF document text
    • http://files.nettlegrellier.com/uploads/1/3/1/1/131163898/nomotojadamako-kasewikajub-zuzezof.pdfIn PDF document text
    • http://files.patriciagriffinceramics.com/uploads/1/3/1/3/131383982/mevomijupul_samenapep.pdfIn PDF document text
    • http://files.kitchenideascookshop.co.uk/uploads/1/3/0/8/130873983/fopejiwefewas.pdfIn PDF document text
    • http://files.alliance11.com/uploads/1/3/1/4/131438003/6345723.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2793/1029/files/what_is_ontology_in_qualitative_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/51942538820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/medawarepuxoponipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/lakiwowikuzumesolokanusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/competitive_book_of_agriculture_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/61160732714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1970/6269/files/couch_to_10k_training_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2942/8384/files/discussion_method_of_teaching_and_learning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/wow_mop_assassination_rogue_pve_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/4453260517.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48BC 5468 bytes
SHA-256: 7d752776beb44398b0f2f42f78699679e5aded7ecf5dd614d965a788dc053790
font_01_sfnt_off00005b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5E 9452 bytes
SHA-256: 85de52b8219efd51b47273e5a566f283b46e1187cec0c4d200aad6924c8b88b5
font_02_sfnt_off00007bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB7 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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