Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd76199605c86b7…

MALICIOUS

PDF

35.7 KB Created: 2020-08-10 15:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 657c7c3a3f6de0cb808a9997e83a61d4 SHA-1: 10a5145b0f41c9ff60a278c6d59d299b14fed486 SHA-256: cdd76199605c86b7e12c1b6ac3c0e203bdc0753c1c9a6d108327be7780c87b86
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a redirector link, indicating a phishing or scam attempt. The embedded URLs, particularly the one pointing to 'ttraff.ru', are associated with malicious redirectors. The document body, though heavily obfuscated, contains text related to educational material, likely serving as a lure. No scripts were extracted, limiting the analysis of direct payload execution.

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=cambridge+igcse+first+language+english+course+book+pdf In PDF document text
    • http://pipifojom.johnhaywardsculpture.com/uploads/1/3/2/6/132681556/ravavi.pdfIn PDF document text
    • http://files.marianohenestrosa.com/uploads/1/3/2/6/132696483/xegilazaf.pdfIn PDF document text
    • http://files.trseniors.org/uploads/1/3/0/7/130776819/863179757bb6.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/1/0427/4746/1788/files/31686033596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/nibepaxaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9911/2095/files/96151740982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2166/3397/files/java_tutorial_for_selenium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/multithreaded_socket_programming_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0802/2938/files/80486269678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/49596621595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/kowawovobulex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8695/4140/files/biomarine_1140_ulotka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/4897260053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/poleteg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3457/files/96003059777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/80290835124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/84325762649.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 3

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_off00004c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8C 5680 bytes
SHA-256: 57d7068df90443e9a39ba7e48928f3dc238ede8e4baa82fae840b786d321d4f5
font_01_sfnt_off00005fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 9836 bytes
SHA-256: 40d9b2a898456eae1bec05fc7c322c09e18c4cd167f96daeb4c5ce586f38c63f

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