Malicious PDF — malware analysis report

Static analysis result for SHA-256 425d33f4bb774ee6…

MALICIOUS

PDF

79.3 KB Created: 2020-08-07 04:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d313e039d0672bd5c7e71e5c5ce6c1f6 SHA-1: 2724f440ddcc6c7f00018f9ba3477a9d330a0ffe SHA-256: 425d33f4bb774ee6fa0fc66b7e1eea17751c9b91b1205f8f135e23762d1f04a8
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=mario+benedetti+biografia+pdf'. It also exhibits characteristics of a PDF link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may be intended to trick users into believing they need a password to access content, likely to bypass security controls.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=mario+benedetti+biografia+pdf In PDF document text
    • http://rukumubo.huronvalleybaptistdistrictassociation.org/uploads/1/3/2/7/132741555/3741400.pdfIn PDF document text
    • http://files.wissamsouss.com/uploads/1/3/1/4/131407369/7755901.pdfIn PDF document text
    • http://files.mypcda.org/uploads/1/3/0/9/130969999/wixefigewixok_xexav.pdfIn PDF document text
    • http://files.tvea.net/uploads/1/3/0/9/130970003/lojulaze_sevejo_debivitoda.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/1/0433/7968/7587/files/xateludalofaraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5476/8021/files/77871712480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1404/5341/files/nisulewasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9911/9013/files/88725586317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/38626266298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/36909080993.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9936/3222/files/tadora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2791/files/christmas_piano_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0812/3303/files/povevegilatoruke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/dokilawaparolovarunaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8982/9800/files/62485157848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/55438167420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9926/8003/files/gubolinepetepomukinonod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/dajuz.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 8

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_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 5144 bytes
SHA-256: bd45022c846256304017745242b63fa7d1b08246d8981cf9adb61e536a0178f4
font_01_sfnt_off000106bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106BC 12368 bytes
SHA-256: 725a4f031bf068889ea8096b353c30ad431bf4a5e12e3b20884ba95fd59d141c

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