Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3f4d43c0c19697…

MALICIOUS

PDF

45.7 KB Created: 2020-08-20 14:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 47db836302b16166908b94d85110c187 SHA-1: 5d64af107c3e6bf9059d450fcc88fb0518490daa SHA-256: 5b3f4d43c0c19697c1b80465a23a09c7c89f10916e6088040d1a5127862e3588
202 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to redirectors, with one prominent link specifically targeting a "dot net framework 3.5 windows 10" download. This indicates a phishing or scam attempt, likely to trick users into downloading malware. The ML classifier strongly supports the malicious nature of this PDF. While no scripts were directly extracted, the PDF structure and embedded links suggest a malicious workflow.

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.ru/pify?keyword=dot+net+framework+3.+5+windows+10 In PDF document text
    • http://files.bensonbunnies1971.com/uploads/1/3/1/3/131379213/mefigesoge-gomomojivuteja.pdfIn PDF document text
    • http://files.myteamtriumph-georgia.org/uploads/1/3/0/9/130969150/favuzu.pdfIn PDF document text
    • http://files.mpowertheworld.net/uploads/1/3/2/7/132740415/kadisetiwebuget_rofajanagojata.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/1/0428/9835/8432/files/51982080438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/likabimunit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9978/2309/files/pyqt_stylesheet_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3963/7155/files/bsff_anleitung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/xagarovabepuzawabepusex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1371/5606/files/digital_business_concepts_and_strategies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/assinatura_digital_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/68757398444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0081/5006/files/26431_shoreview_avenue_euclid_oh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/tezotexusunawosonogore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/xatun.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E34 5688 bytes
SHA-256: 26df74c3d0ffad3c7fd330fc20dcc81f5fdbe10c1968bc90d7d2680db000baff
font_01_sfnt_off0000719c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719C 10200 bytes
SHA-256: a970eb77ce378cdbda22b0a5ce059aa771ceace4f097cb6f580434b0abd3c690
font_02_sfnt_off000094ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94AE 16120 bytes
SHA-256: 792b17e2d8b7926bbf982488bb4a17e77740ea3a38fff94c5bbd2958d4a1dfd7