Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fc213bbefe407c…

MALICIOUS

PDF

39.6 KB Created: 2020-08-23 08:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc95e206ebd04392c7ed7b9cc11e06c4 SHA-1: 5dd3463ca14b181d1d01911aca2a2e18fac19bbc SHA-256: 15fc213bbefe407ca3bf7b5608e8996e86231eb4aa84d4cc3098706bdff99a2d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector infrastructure designed for SEO manipulation and phishing. The primary lure appears to be a "photo maths solver apk", suggesting a potential attempt to trick users into downloading malicious applications. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL reinforces 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.ru/pify?keyword=photo+maths+solver+apk In PDF document text
    • http://giwix.sacredheartyouth.org/uploads/1/3/0/7/130775085/mojuwuzunuj.pdfIn PDF document text
    • http://files.galleriasaba.com/uploads/1/3/1/3/131382841/setumaw.pdfIn PDF document text
    • http://files.zandugandzic.com/uploads/1/3/0/8/130874683/wikilaluvifisufuk.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/1/0428/5064/8223/files/71680571698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3590/1602/files/dakigagomopelawavorubiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0268/2789/files/pupedaxarifiridodebiwul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/corporate_finance_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/60672580512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/prehospital_emergency_care_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/vibifexeluwobutilab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/suwimufileviw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/auditing_notes_for_south_african_students_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/79906784890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2562/1404/files/66994099977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1954/5245/files/95094514147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/90839090275.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
🗂 Part of campaign: galleriasaba.com 6 samples

Related samples 4

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_off00005b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3A 5184 bytes
SHA-256: 52055f930478ef02251d2851dddaaaba0c8a33fcf63fd0516fdde3dfe6d4f56a
font_01_sfnt_off00006cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 11032 bytes
SHA-256: a858e2e118555a12ad4c24cef1de466709bf00c0e8f8a3616e540c94ba50d7ba

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