Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f4ba8728ed6796…

MALICIOUS

PDF

43.6 KB Created: 2020-08-23 03:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5226d11e3d401777a28d1413d3a6387d SHA-1: 30d0ad3b1f7df6e8e9d2c7d7a0e74f8dcabf9ee5 SHA-256: 62f4ba8728ed67962ca200b6f41768f40a68af5a6bc8f810a1e41bbb40918dfb
194 Risk Score

Malware Insights

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

This PDF document contains numerous links designed to appear as legitimate documents but redirect to a malicious domain, ttraff.ru. The ML classifier strongly indicated maliciousness, and the presence of a redirector link confirms the intent to lead the user to a potentially harmful site. The document body itself is heavily obfuscated but contains the primary malicious URL.

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=diagn%25C3%25B3stico+de+anemia+falciforme+pdf In PDF document text
    • http://files.emilytodt.com/uploads/1/3/1/4/131406785/99e03c7b28a8e23.pdfIn PDF document text
    • http://files.braaibeque.com/uploads/1/3/0/7/130775174/3392100.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/1/0430/3015/1330/files/41907306845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/79508919745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/teclado_espaol_mexico_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/bleacher_report_nfl_predictions_week_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/57928111422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3703/8491/files/little_brown_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/binary_large_object.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2682/4859/files/pinajawuxepoba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/78774187674.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_off000068b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B2 5608 bytes
SHA-256: 52620ae4f169658e1977df32aa264574c9bc949f3642e48c414dd18b662c5783
font_01_sfnt_off00007b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B70 11132 bytes
SHA-256: e8586e5994f405eed70c285a5b042afeed1ea6f13bd32d1c701b6ed8f5f93bb8

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