Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8e03b107f49f769…

MALICIOUS

PDF

72.7 KB Created: 2020-08-21 14:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 169df5d1dfc6b7a05d8cdaed5aec86d4 SHA-1: 03ac2fa0ba98a33f42910b0258684980a77b3330 SHA-256: c8e03b107f49f7695565c9dfef89269acd4dc06593dd21f7ffe76e46091c3cda
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=reporters+without+borders+singapore', indicating a likely attempt to direct users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=reporters+without+borders+singapore In PDF document text
    • http://zedoze.ucfootball.co.nz/uploads/1/3/2/6/132681927/buvipenorabifutin.pdfIn PDF document text
    • http://files.samantharicchiuti.com/uploads/1/3/1/1/131164048/1349300.pdfIn PDF document text
    • http://files.melonilab.org/uploads/1/3/1/4/131409309/dagezeja.pdfIn PDF document text
    • http://muwumosan.lovelepink.com/uploads/1/3/1/4/131410007/54e1ccfd140e2e.pdfIn PDF document text
    • http://files.midvalelincolnpto.org/uploads/1/3/1/4/131482808/xeruginegel-tavaz.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/1/0448/1862/8765/files/ammerland_flute_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/fuzaruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/tijinesor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/nusalasote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/wivebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/nejov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4866/3200/files/25189573463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6376/7203/files/minecraft_skin_editor_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3178/7670/files/abdominal_massage_for_constipation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/ragedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8156/3286/files/pawogeloz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9999/4789/files/wordly_wise_book_7_lesson_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6111/6064/files/converter_to_kindle_format_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DF 3036 bytes
SHA-256: 0193c5c66da104de5168f83d1d2c3ad9431c911da8fbbc15b69745f38f0436bd
font_01_sfnt_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 5428 bytes
SHA-256: 16d332c423ea30582116a235b9f1a896e17318d693d52f1424d1003928cb0fc2
font_02_sfnt_off0000e721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 14628 bytes
SHA-256: c4ad83f9e24a99122ddf95598fbb3fb2d4c7ab4a50541842196504b35df4fd42