Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5aed23caac9b9a…

MALICIOUS

PDF

40.8 KB Created: 2020-08-21 03:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a900069f8da1a97ebe61f1354a277445 SHA-1: f43e168946017e378e0c4856178e46fe63949bae SHA-256: 0a5aed23caac9b9a7b6278d6e839094c22c5e978d4703c25f0e814d46d1ccd86
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to redirectors and a link farm, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains text related to 'electrons configuration practice worksheet' and a URL that appears to be a lure. The ML classifier strongly indicates maliciousness, and the presence of redirector links further supports this assessment.

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=electrons+configuration+practice+worksheet In PDF document text
    • http://wubekolo.bhbrilliantminds.org/uploads/1/3/2/7/132741155/bf32061ec.pdfIn PDF document text
    • http://files.lemanclassics.com/uploads/1/3/0/9/130969218/gufuxubam-lulefivepoxafu-futokukuviruku-muvotatiwimotu.pdfIn PDF document text
    • http://tenazod.ofspirit.net/uploads/1/3/1/4/131438003/03166fe4b9775e.pdfIn PDF document text
    • http://xopobuf.beautyequipmentcenter.com/uploads/1/3/1/4/131437984/wuwujawabuvuz.pdfIn PDF document text
    • http://files.cancercars.net/uploads/1/3/1/3/131379439/fujefum-vajipeziwubex-favovuvabejed-sixuritigoko.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/1/0437/1464/2069/files/newavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8938/5885/files/30799152359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66083684812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1791/0944/files/vofadudebiwidip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/73316673436.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/adverbios_de_frecuencia_en_ingles_ejercicios_resueltos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/sojad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1320/8226/files/pazesok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/31655035099.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 2

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_off00006050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6050 5388 bytes
SHA-256: b27c99f49ac334fa12956dfbe2d1b7bae116a18d0050203faa431786c903b9e4
font_01_sfnt_off000072bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BB 10348 bytes
SHA-256: d85022614e3e31ef25567b6f030e3ae5e84ed953aaf5142b09c93d01174f77e0

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