Malicious PDF — malware analysis report

Static analysis result for SHA-256 8110543a7d0974ed…

MALICIOUS

PDF

39.4 KB Created: 2020-08-20 11:10:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 2155cff611cdae8f8cf180576cbaba5c SHA-1: 2d1bf2a2e8a4ac6a1341028d5fa3128f01c1d425 SHA-256: 8110543a7d0974edaf85a928b4d28f4e6f1f193dd1ac30e01ca523fd6dbaec1e
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, disguised with keywords like 'Justin Bieber video song sorry free' to entice clicks. The ML classifier and critical heuristics strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links point towards a social engineering attack.

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=justin+bieber+video+song+sorry+free In PDF document text
    • http://wunasulas.meganphibbons.com/uploads/1/3/1/6/131636612/sufoxiwonani.pdfIn PDF document text
    • http://wivag.mrsgoldsteinsclass.com/uploads/1/3/0/7/130776779/vaxufowag_nulokijotas.pdfIn PDF document text
    • http://files.4everinelectricdreams.com/uploads/1/3/2/7/132740564/97236ef5dcf.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/1/0436/2623/4009/files/lilaliripojonasozovasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/polelolumof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/newark_weather_radar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/71589347074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3928/4645/files/rigovutomo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/59014598633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/25631941225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4516/2903/files/88132771312.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/centrifugal_pump_handbook_free_download.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_off00004fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB9 5004 bytes
SHA-256: ba6725ad67a14d88467c9d75e8e73fe1d39da1bab58b451202c3c4f8be597508
font_01_sfnt_off000060d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D0 9980 bytes
SHA-256: 4136933c529f4aabfb09e8dc271293c00273c4c3f067214bdb620e2507fa3f0e
font_02_sfnt_off00008314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8314 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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