Malicious PDF — malware analysis report

Static analysis result for SHA-256 645726f4a85c78aa…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 11:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 899a6537d5c40706a1e9b4e93b36a186 SHA-1: 35e5c862be2e405eaed4482b073699c03de44c8f SHA-256: 645726f4a85c78aa9aefe41e8085713629425f1b31e3f2f24671b6693f95225c
242 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known redirectors and a large number of external PDF links, suggesting an SEO spam or phishing campaign. The document body also contains a URL that leads to a redirector. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' suggests the document may also attempt to trick users into executing commands.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.com/pify?keyword=bmp+to+pdf+windows+10 In PDF document text
    • http://bimewe.tametracktour.com/uploads/1/3/1/6/131606490/3461606.pdfIn PDF document text
    • http://belobeda.jmccormickbennett.com/uploads/1/3/0/8/130814328/nomigitigetaladi.pdfIn PDF document text
    • http://files.lyonstownship.org/uploads/1/3/1/4/131437889/6188a90724926.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/1/0427/9032/2335/files/41026845425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/sanewalibegemopimikebud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3379/6509/files/95328235071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/dirks_castes_of_mind.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31321710084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/zapafuxupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/risuwaxovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/86013702961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/kifokipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/22210567618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/29071025782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/wufulekidewexetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1141/4939/files/11824047644.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F53 5184 bytes
SHA-256: 23cdc4201055ff3905523c6ec6b743aaaa9a1603df00ac63c5b613190e8caefd
font_01_sfnt_off0000710d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710D 10220 bytes
SHA-256: 0f51fbd9b6d0f9cff9821375add8b552f03ca76f248f8a2c0a8c5daa54f2fd0d