Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc055dc63d18db9…

MALICIOUS

PDF

61.9 KB Created: 2020-08-06 16:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f20e9ad04361698c43692ccf28246ce SHA-1: 487ab9537dfa0be630e8309143b9334d291509b8 SHA-256: 7cc055dc63d18db969b834d13dc0a96582c52b723a107e6d7a09aee2605a4b3e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links, many of which point to a redirector service (ttraff.ru) known for malicious activity. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for a "free download" of a PDF, likely to disguise the malicious redirection. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms 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.ru/pify?keyword=historia+biblica+de+jose+completa+pdf In PDF document text
    • http://files.headstrongequestrian.com/uploads/1/3/1/4/131411688/loropixozovazotur.pdfIn PDF document text
    • http://files.brendaknows.org/uploads/1/3/1/3/131382134/eb431082870fc8f.pdfIn PDF document text
    • http://files.porterrc.com/uploads/1/3/1/4/131407012/4301461.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/1/0433/6176/3480/files/68440724074.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3264/0679/files/6021299015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/47742973828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6863/6834/files/76010848470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/8493312582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/64312777704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6435/1130/files/sifena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/pofowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0747/5875/files/gabukaganiterulasoduje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/babixasegubewoga.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FEF 5476 bytes
SHA-256: f0bf161cfa60f5255e394a458d56704bd87879abffd4c68de1ab9a56ab08e3c8
font_01_sfnt_off0000a273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA273 13972 bytes
SHA-256: e667c7dd49483f974fb1b4cfc43e26e8daee84db08f7a771489adae7e440a457
font_02_sfnt_off0000d00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00D 17264 bytes
SHA-256: 6c811f52d9d424b114e61cef7b2a0d4e2f609d758ed65ce1597ffa53e7b131b3

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