Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edde51e09ed159d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-11 07:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1b788799c2cafe7c22bb252db68669fa SHA-1: 771b759095d37751fab517807d44ccd7a1c61e59 SHA-256: 4edde51e09ed159d026c0bae5b0d8137c766b3df90b9b1a650998de98b4b7a3f
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One of these links points to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files hosted on various domains, suggesting a coordinated effort to distribute malicious content or engage in SEO poisoning. The ML classifier also strongly indicated maliciousness.

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=ashrae+standard+34+pdf+espa%25C3%25B1ol In PDF document text
    • http://files.zulemasummerfield.net/uploads/1/3/1/8/131856290/8c1a62e47513.pdfIn PDF document text
    • http://xoteba.mondulkiritour.com/uploads/1/3/0/9/130969747/fde6d62ce6b14c.pdfIn PDF document text
    • http://nawore.vazpintotennis.com/uploads/1/3/0/9/130968917/7761093.pdfIn PDF document text
    • http://files.newvinylart.com/uploads/1/3/1/4/131409526/madan-wevejojib-lovefute-bibimi.pdfIn PDF document text
    • http://valus.jwaycott.com/uploads/1/3/1/3/131383791/wowifijatosebuz.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/1/0434/0449/2957/files/sisajanosuvufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/92710649548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/zuwilebebixosogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/80672939662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/povumad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/37301015033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/xorugus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8098/2432/files/26592786287.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/faluzodiripijuwoworetisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/52975337394.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/53809937544.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 7

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_off00006949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6949 5580 bytes
SHA-256: 57dc8644549ea852b1788de975ff935845c9c15b6a54197b57a2954d915623fd
font_01_sfnt_off00007bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFF 10696 bytes
SHA-256: 1102c8bf6f04f7c41a6f4e6ec7faaa83bd03b3db3f2dcb08023bbac980deae0a

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