Malicious PDF — malware analysis report

Static analysis result for SHA-256 da073c75b8d38f50…

MALICIOUS

PDF

44.5 KB Created: 2020-07-31 17:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 78fac915588ab9bfd3f968c734e807e4 SHA-1: a3d4dccd81f6f97503316b90a0e9419b5d8ee121 SHA-256: da073c75b8d38f50cad59ca73f2ae4dfc23714121996dacf276be9004aab8738
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests the document is designed to lead users to malicious infrastructure under the guise of providing test questions.

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.ru/pify?keyword=auto+mechanic+test+questions+pdf In PDF document text
    • http://files.circleoffriendspreschool1.com/uploads/1/3/0/7/130738553/datexumemawulo.pdfIn PDF document text
    • http://files.rossimachineryservices.com/uploads/1/3/0/7/130739949/7812311.pdfIn PDF document text
    • http://files.radovansebesta.com/uploads/1/3/1/3/131398141/725495a374.pdfIn PDF document text
    • http://files.artistsfusion.com/uploads/1/3/1/4/131409709/cbfbc.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/1/0439/3032/1051/files/bakinufimupixijovogijob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2214/files/fozikekivamom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/bibabixerudafexugon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/vexozowawov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/dutatigaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7612/4821/files/26123006561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tuwaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/zunajevelosunaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/matawupuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/zuzub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6463/1195/files/benipawotolufojonujorotu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6528 5264 bytes
SHA-256: 80312175868fd64812c2ccbbb2a8d2e59d04d59d60cf223081f12f76403d85ee
font_01_sfnt_off000076ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EC 9332 bytes
SHA-256: e78a52777dcf36f564c450f1014ef0a3f0a5c25a662bc40d4d0ba9172f0d21e5
font_02_sfnt_off000096cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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