Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb1d65a3ab33c25…

MALICIOUS

PDF

60.2 KB Created: 2020-07-30 23:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e631ac6a9d6a24a2c0f5a2e340ce369a SHA-1: a1d034dd0fdd12a0416f5ff9849fdd6b44e64fdf SHA-256: 1bb1d65a3ab33c257766a59ae61a361d592b846e36fb99ddf7425eaa32fa58fd
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure. The primary malicious URL identified is ttraff.ru, which is used to redirect to other sites, likely for phishing or malware delivery.

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.ru/pify?keyword=site+reliability+engineering+google+book+pdf In PDF document text
    • http://files.fortytwobooks.com/uploads/1/3/2/6/132681836/fawilo.pdfIn PDF document text
    • http://files.nbhp.org/uploads/1/3/1/4/131454355/fazukupefosu.pdfIn PDF document text
    • http://files.johnredekercards.com/uploads/1/3/1/1/131163986/bagazuvadiropajajo.pdfIn PDF document text
    • http://files.stpiusxtucsonyouth.com/uploads/1/3/0/7/130740517/pugamubuvoxi.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/1/0433/3184/6296/files/fufuxusagimalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5630/7107/files/10714688317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/seruwekosulumilodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6183/7981/files/fofosupujovanafiwileniwud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/79783724084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5763/files/talafonare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4549/4684/files/poxifexaxulomubolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0308/3928/files/21099509406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3711/1973/files/49734934626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/52335142788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/23778982408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/6916310152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesulemenakasisot.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_off0000adf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADF2 5228 bytes
SHA-256: a940d7f9ffc12964c65ca7d4508cca996a89d7011a5a2edf6d2ca7a314ef3e2f
font_01_sfnt_off0000bfc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC7 10324 bytes
SHA-256: 21827fbb5deb70e57672819f3bfdeb586cc68c0565aaa389494f28ef89f2cf65

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