Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe62effb93d105f9…

MALICIOUS

PDF

34.3 KB Created: 2020-09-09 21:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78d3e7ada3201447e56306894e991c68 SHA-1: 8e5b8f91b3681c359e92c0ff32bad93268359841 SHA-256: fe62effb93d105f956949771c06ada967bda53b7712cd5f5e1a0e330aaadbb7e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with the primary link leading to a redirector. The document body, though partially corrupted, suggests a lure related to an educational answer key. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to distribute further malicious content or phishing pages. 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.club/wix?keyword=learnwell+communicative+english+class+7+answer+key In PDF document text
    • http://zozod.sunandachatterjee.com/uploads/1/3/1/0/131070450/joziduvo_jusopelazevob.pdfIn PDF document text
    • http://files.princetonclubbiggestloser.com/uploads/1/3/2/6/132696214/1779923.pdfIn PDF document text
    • http://gazido.happylittleartstudio.com/uploads/1/3/1/4/131453574/7896999.pdfIn 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/05301a_3d381e9f93874d409d84f7378854bf48.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ea78e0_73ff42079b9f46a59a60574f126eea84.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf5aa9_bef42731c7cf486994313c737d33b7e4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bca722_c40bfd33d8f74104b2f852be9b2856fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fedf23_aa4353ae9ff0423bae90c9de57e28a0b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/44b221_9d37c8d0e8734bbd829261ca6b1451b1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5a2b4f95692f4b54b6e802b59bb32fc5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ecec20_bec8791db8fb442692cc474c7f77e6d7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3cb6cb_5f7bf3d5045941d58f51173da208d08b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/05900a_16ece4db20354883b401acffd4c1e428.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eeb7bd_7a9667cd1d0b4fa5b8c05d27aa3d332b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ff653_69f08117e6824303884a456f98bec8da.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_off00004832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4832 5552 bytes
SHA-256: 3a3de573557425a1d91f37d2c9beafe98b64c3ffc569bd33ace682acd4b7c622
font_01_sfnt_off00005b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B15 9664 bytes
SHA-256: c21f3049458fc3e3f71102ddb2741e8827e0ce51ab841d09ca81bea168c36366

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