Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f76a6ee12f141f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-14 12:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c83ebae299024577192e80f6bb49acc0 SHA-1: 8442b8dafff12d327886656904f1af4f4458b061 SHA-256: 99f76a6ee12f141f8c5e6310a2639c5d6b865f3e95791f77236acbb44c36d7e3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to 'ttraff.cc', identified as malicious. The document body, though heavily obfuscated, contains text related to modifying PDFs and mentions the wkhtmltopdf tool, suggesting a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector URL indicates a phishing or scam attempt.

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.cc/wb?keyword=modifica%20pdf%20con%20mac%20free In PDF document text
    • http://files.knowbiblefactsfromfiction.com/uploads/1/3/0/7/130740210/8383204.pdfIn PDF document text
    • http://leribemo.thehauntedvineyard.com/uploads/1/3/0/8/130874104/4b5ec0e59e5d.pdfIn PDF document text
    • http://tovuteg.waysidechristianmission.org/uploads/1/3/0/7/130776445/fenonegav.pdfIn PDF document text
    • http://files.mdmedicalspaandwellnesscenter.com/uploads/1/3/2/7/132710669/94d712.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/1/0437/8938/5888/files/calendario_mundial_2020_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8860/8418/files/zoviru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7502/7619/files/pesakol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9947/2551/files/10648944983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/xinuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0351/8882/files/rosalupibowij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0728/7206/files/69975629837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3789/2509/files/disaster_risk_management_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/dokukivasizinumasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/vosogupexurob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/19492926301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5299/8556/files/74401532699.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEC 5096 bytes
SHA-256: 2891173b5ffcd966de1713fd240b39b10712cbc68dab06f138956153e5770297
font_01_sfnt_off00007f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2E 10988 bytes
SHA-256: 9dc6774fab6d22968918e52ca919b357c95505b09f25926328930790c94b651c

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