Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c67c27cdc69459…

MALICIOUS

PDF

35.9 KB Created: 2020-08-27 13:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: de0506d3e7a93ba5d310d562a9ad1feb SHA-1: 3a8e7dd781e20edc38fea6fedce3c6fe6e8c8944 SHA-256: 38c67c27cdc69459b85b2d41159185a69e353200c52308ae668f41e161cadb8a
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links redirects to a known malicious URL (ttraff.ru), indicating a potential phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious link farm.

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=ingenieria+ambiental+henry+heinke+pdf In PDF document text
    • http://files.caumorgans.com/uploads/1/3/1/8/131856212/vanifawa-siwuromet-lonaluz.pdfIn PDF document text
    • http://gomusil.idfva.org/uploads/1/3/0/7/130739726/f97d91212b9756.pdfIn PDF document text
    • http://files.archieparnell4congress.com/uploads/1/3/0/7/130775379/vomibazoti.pdfIn PDF document text
    • http://files.monarch-therapy.us/uploads/1/3/0/7/130775840/6923160.pdfIn PDF document text
    • http://files.handmadebylouisa.com/uploads/1/3/0/7/130775827/25f7f89e987e0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/40767252389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/apostila_de_curso_de_violo_em_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/gdb_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5819/1768/files/health_effects_of_noise_pollution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4976/0406/files/18732874817.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7284/0090/files/97631626740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/amulet_book_8_supernova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/35630214434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/cheap_cheer_uniforms_uk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4480 5196 bytes
SHA-256: a7a9b7d03bc9cb0922bb0663d7b249269ef0acf87358ae25e92290214198a1db
font_01_sfnt_off000055f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55F7 8952 bytes
SHA-256: 8e49668e5e645dcb8384c1f6f4e0e0085c1c0c26521b7c87b56db0f8993610ec
font_02_sfnt_off000074a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.