Malicious PDF — malware analysis report

Static analysis result for SHA-256 9890bb578660055a…

MALICIOUS

PDF

48.9 KB Created: 2020-08-22 12:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a95c418d8a446d339cd81cbd5df20e3 SHA-1: 8a9761e5de0727dd1faa58e4a6b81260d7456299 SHA-256: 9890bb578660055aae39d5e745f80c246570e3630229061d869da2149729ecd4
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious site. The document body mentions 'Utorrent apk for android' and includes the malicious URL, reinforcing the phishing lure. The PDF also hosts a link farm of other PDFs, likely for SEO manipulation to increase visibility.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=utorrent+apk+for+android+2.+3.+6 In PDF document text
    • http://files.clarkparkway.com/uploads/1/3/2/6/132681992/gajofalim_kaxuso.pdfIn PDF document text
    • http://files.donnamarieferguson.com/uploads/1/3/2/7/132740413/961039.pdfIn PDF document text
    • http://files.wrightseaplanebaseinc.org/uploads/1/3/0/7/130739835/gatip.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/1/0432/7548/5348/files/94197229603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6939/files/naraligu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/python_sort_tuple.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/sejavetofomazizezewalugit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2864/9896/files/47112280557.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/jojut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2181/1364/files/nalolirunarolawaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6527/8625/files/free_printable_september_2020_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9702/1854/files/molema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6718/7108/files/favewapo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00006994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6994 5364 bytes
SHA-256: 55f473550977a818ce7589089dbea3ee803916dea5acdb7f503a04408703c38f
font_01_sfnt_off00007be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE6 11020 bytes
SHA-256: db822692a10d47837905fc9eacc230a220ae7f2c10f4d707b30cdbddb96a45e0
font_02_sfnt_off0000a19b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA19B 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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