Malicious PDF — malware analysis report

Static analysis result for SHA-256 839e5b930b18a718…

MALICIOUS

PDF

88.9 KB Created: 2020-09-20 06:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67f9c1011cdd0fb38e2a6dfeec3cbeb3 SHA-1: ac9578352f9fb73ac096d2211975778d51e3b6d5 SHA-256: 839e5b930b18a7184911336c1c084c2ed7c2985148b9cc9773a3532ba613eaa7
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many of which are hosted on Shopify and appear to be part of a link farm designed to mimic legitimate downloads. One prominent link, 'https://ttraff.link/wix?keyword=serial+number+photoshop+cs5+startimes', is identified as a malicious redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content likely prompts the user to install a browser extension or update, a common tactic for credential harvesting or malware delivery. The ML classifier strongly flagged this PDF as malicious.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.link/wix?keyword=serial+number+photoshop+cs5+startimes In PDF document text
    • http://files.melisakaye.com/uploads/1/3/1/3/131379873/nudiz-milawiru.pdfIn PDF document text
    • http://rifed.holisticfamilycare.com/uploads/1/3/0/7/130739906/xaleni_gowaf_rigapakukal.pdfIn PDF document text
    • http://files.spoonfulpdx.com/uploads/1/3/2/7/132712315/dfaa68483e546.pdfIn PDF document text
    • http://xiwozin.dannyflynn.com/uploads/1/3/1/4/131453943/damifugipisi-govobidopepaso-xadubopuwipevon-nuzaluzuzazijit.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/1/0431/1767/4656/files/didafiputawomifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/9175/5938/files/celpip_score_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/98495060597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/wigugibuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/odisha_map_download_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/ranuxaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/taylorkayteee_workout_guide_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1523/3948/files/add_template_powerpoint_2013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3146/5631/files/how_to_use_a_handheld_sewing_awl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/57334080173.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00012c7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12C7E 24084 bytes
SHA-256: 66fc3a0966ed02ef8ed7104bf0ab82df4d9d1c5abe2d20fe381e14cff6993d69
font_00_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 5540 bytes
SHA-256: 3647cec67f0a174e57fe2043e544ed5521de6bdbaf72c79f5b80efa8478a2641
font_01_sfnt_off00010116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 13428 bytes
SHA-256: 42a935091efe7ed6ebbe8ce83ef0de0ca3ca42ba1c2c2ff6d0c7319a8d8dc8a0