Malicious PDF — malware analysis report

Static analysis result for SHA-256 6951135da773b08e…

MALICIOUS

PDF

43.8 KB Created: 2020-08-11 17:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e0a9d1e9bff08572dfd48df6db2af45 SHA-1: e0b86b78cd9b983dbd9edc237cfe6b4f6fde8fa7 SHA-256: 6951135da773b08e9e49909928660e69491e80a2e3f31e17774cabdf5e7c02f7
234 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and SEO link farms, suggesting a phishing or scam campaign. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags the URL 'https://ttraff.ru/pify?keyword=solu%25C3%25A7%25C3%25B5es+isotonicas+pdf' as malicious. The document body, though heavily obfuscated, contains this same URL and other links, reinforcing the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=solu%25C3%25A7%25C3%25B5es+isotonicas+pdf In PDF document text
    • http://files.root2riseyogaandfitness.com/uploads/1/3/0/7/130776088/7716605.pdfIn PDF document text
    • http://files.pa4sc.com/uploads/1/3/1/1/131164402/gagitozivi.pdfIn PDF document text
    • http://files.assessormag.com/uploads/1/3/0/8/130874278/4872039.pdfIn PDF document text
    • http://jivapu.rawpetfoodtennessee.com/uploads/1/3/0/7/130775045/gemuru_gefowonojubevin_nadeb.pdfIn PDF document text
    • http://files.kentuckysocietyforrespiratorycare.org/uploads/1/3/1/4/131453256/kudata.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/1/0430/4257/0402/files/bepudanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/posomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/lodaferivexukuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5890/5759/files/kezonaxaduwigovepajidanep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/nifabesexaripupulerubafew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/tofimutefiparis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2823/9768/files/physical_science_grade_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/lofopuzujegesetosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2399/8874/files/mefuvuwuzenel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1288/0541/files/pneumonia_tipikal_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8252/2528/files/chevy_astro_repair_manual_free_to_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/30251082680.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 5556 bytes
SHA-256: d04ecc4b95eb47500d007092eb42174260951c9e0f64b968934aeda1454015b3
font_01_sfnt_off000075d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D4 14672 bytes
SHA-256: 7427352a683ad8a2a60edd33ec0da8652b4b854b5badc363af32714324cf069c