Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c2f1d7bc1b7feed…

MALICIOUS

PDF

39.9 KB Created: 2020-08-30 04:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f7fff8033cb684d91ca8b35d6abbc8a SHA-1: ae17ba551d0ec9d0490ecc0c9155cf62debce1e0 SHA-256: 5c2f1d7bc1b7feedfda0e7c04dfd76d2b2c8a5ca0335b2150136fe2aeb71bc59
194 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a redirector URL, which is flagged as malicious. The document body, though heavily obfuscated, contains text related to 'summer internship project report', suggesting a lure. The presence of numerous links to external PDFs, many of which are benign, indicates a link farm strategy, likely to obscure the malicious redirector. No scripts were extracted from this sample.

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.me/wix?keyword=summer+internship+project+report+format+for+mba In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a1fb72_ed134c4d088e495c85cba6b8da81589d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_988bedc97cdb49f8883d70279d691a8f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b9801a_30f9a812f8ad438eaa23016fc66b8a1e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aef5b7_da196d7ffc334505bb345b5ccd3329f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3cef954ce79b4218a3d2544bfe812b1c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/822ecd_80137f9f0a064bb5a8e5a808e042906e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/99a8f2_1ab4ee90a0614b1f9226c7e6d4c61c27.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/516793_1a585a409ad749e9b69b39dc1b2945c1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2c2ee0dedd6a448a91324ba382142939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/69272409289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4777/9478/files/62631409569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6913/5262/files/biblia_traduccion_lenguaje_actual_descargar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/20500071471.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 1

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_off00005c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C40 5544 bytes
SHA-256: c17c1ce99b1c41f3827234e12860f39251204e0241ad4a55a2e64791716be52f
font_01_sfnt_off00006ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE9 10456 bytes
SHA-256: 657534135b660dcc8cd236e8bcb1994ac6434a959c500d1dde4fc39677a275a2

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