Malicious PDF — malware analysis report

Static analysis result for SHA-256 1885cda8bfcf6051…

MALICIOUS

PDF

45.3 KB Created: 2020-08-25 10:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6983100028e285c5ce204d22632deed1 SHA-1: 698b6945b3bd0f6dfc9c7b4fa5e7bf8aaa3c75d3 SHA-256: 1885cda8bfcf605129f8f3284f53f04886fcd31eba6f78f9d17d8469c0648e22
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious infrastructure, specifically a link farm designed for SEO manipulation or phishing. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie guide, which then leads to the malicious redirector. The ML classifier strongly indicates 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.com/pify?keyword=nightmare+on+elm+street+6+parents+guide In PDF document text
    • http://files.museumtrustee.org/uploads/1/3/1/3/131381103/viririvero-lelesapi-levosali-wusid.pdfIn PDF document text
    • http://jitiwekov.benedictinefarm.com/uploads/1/3/0/8/130814995/vubapen.pdfIn PDF document text
    • http://files.macbrothersgourmetfoods.com/uploads/1/3/1/0/131071041/280f5d.pdfIn PDF document text
    • http://files.brookeelementary.org/uploads/1/3/0/7/130739470/9510149.pdfIn PDF document text
    • http://files.artistsunitedclub.com/uploads/1/3/2/6/132681891/475edd4efd.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/1/0434/3300/1126/files/sql_formatter_online_tool.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5850/3573/files/gexavewetesaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/tawusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9801/1816/files/71769911689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/goben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/aisc_column_base_plate_design_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6052/7265/files/statistical_methods_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1162/0509/files/61953053902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6921/8454/files/fp_a_resume_template.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 5

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_off000072bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 5496 bytes
SHA-256: 8d468742fbb906cf9048ce5fdf720d55557f88829bf906c37ae07775650a682a
font_01_sfnt_off00008546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8546 10356 bytes
SHA-256: b3be3f3cae95020686d155b78f86ba4f938b1af4385bdf3b7a45e5f8d1dcc7d4

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