Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edbc74dc5556bba…

MALICIOUS

PDF

39.4 KB Created: 2020-08-18 17:37:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2f01c28b82aab3402d7bb88d9183c4b8 SHA-1: 2ac363f0d4a5c708ccfce04da56f1edf69174d04 SHA-256: 7edbc74dc5556bba97fad294ccd1aaf7d442baac5ef3a2f3557d73705e7cd1c5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.ru) disguised as a free PDF download. The document body, though heavily obfuscated, contains the same lure text and URLs. This indicates a phishing or scam attempt, likely to deliver a malicious payload or redirect to a malicious website. The ML classifier strongly supports the malicious verdict.

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=nursery+rhymes+ukulele+chords+pdf In PDF document text
    • http://files.findingspecies.org/uploads/1/3/2/8/132814196/nafepitor.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/1/0433/7287/1832/files/chateau_de_chambord_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/ritozusakufuwixotara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1897/6408/files/nhentai_food_wars.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/jasukezegadumugeloxofazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4410/8445/files/two_letter_english_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1019/5605/files/faa_far_part_61.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/absceso_hepatico_amebiano_cenetec.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/fexaxapop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/zomulijesele.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 2

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_off00005ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA5 5320 bytes
SHA-256: a9b7369d66fc55d78ed5c21f5a50c20e20ec07de4d5a9f8bb21a57cc6c23d355
font_01_sfnt_off00006da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA5 10448 bytes
SHA-256: 4a9ec3f352d1e6e62102d8192b67836f41a2c74dc32855980be40f7e024063d0

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