Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b9f670f267b453…

MALICIOUS

PDF

34.6 KB Created: 2020-08-26 13:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1721b51f6979b2820663516251abb1d6 SHA-1: 93048bac5cd227978589f2d5967ada178cac676f SHA-256: 78b9f670f267b453d22f760aaff6d9ef7930a3c16fc091fd92f506b3477cb912
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector for 'free-download phishing'. The document body contains text that appears to be a lure for downloading 'Naa peru surya bgm download'. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate malicious redirector links and a link farm.

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.com/pify?keyword=naa+peru+surya+bgm+download In PDF document text
    • http://waguzusi.emmihilger.com/uploads/1/3/0/7/130774993/najipufixuxosudupe.pdfIn PDF document text
    • http://pejefa.achievewe.org/uploads/1/3/2/7/132740930/rogebapinatibo_bodebumirodi.pdfIn PDF document text
    • http://files.reformactivismdesign.com/uploads/1/3/1/3/131383251/komuwilito.pdfIn PDF document text
    • http://nefitima.earthchildbooks.net/uploads/1/3/0/9/130969679/wemipurelagizavik.pdfIn PDF document text
    • http://bowuxo.fcsautomation.org/uploads/1/3/2/6/132680835/5a6870c8c014.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/1/0438/1776/2973/files/67268934992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7795/0881/files/rokulutobufapilot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7931/8166/files/gta_vice_city_mobile_cheats_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/cogat_practice_test_kindergarten_an.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/alberto_moravia_boredom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9432/7975/files/america_history_of_our_nation_textbook_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0772/0854/files/bibakefinuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/vector_magic_key_gen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/daxuxifoluwebufigetepejaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2625/9876/files/esc_guidelines_2020_valvular_heart_disease.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 8

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_off000047c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C6 5580 bytes
SHA-256: 666d9942fb6e47caad0b70e00021628bb91067ded15d30987be24a51cd0ae892
font_01_sfnt_off00005aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABA 10056 bytes
SHA-256: 8d3022efb17a69402937e5adda54d1ad5798c1cec39c38fdb043e851f1b14ecc

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