Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d5ac1b31c9b9e4…

MALICIOUS

PDF

49.4 KB Created: 2020-08-03 07:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b9a3fdec1bed82e72a8fedc059718a0 SHA-1: ca58b63d301b598b67534dff2e7e2dff7763f687 SHA-256: b8d5ac1b31c9b9e4855494a182288f3a1c38d8ec8f8e1aba1801a5ff1986f38d
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, contains text related to game modifications and a URL that aligns with this lure. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL.

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=mods+for+gta+5+on+xbox+360 In PDF document text
    • http://files.lilithsconjurebox.com/uploads/1/3/0/8/130814169/faa04f5bedb9.pdfIn PDF document text
    • http://files.imagickaonline.com/uploads/1/3/1/6/131606360/a0147ac226.pdfIn PDF document text
    • http://files.caseyharvilla.com/uploads/1/3/2/7/132712214/vevuzupakaki.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/1/0435/8438/9275/files/skyrim_grey_face_bug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/26277644434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/16454823545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4234/8949/files/93454632279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8999/2605/files/sarobetufolividiponipop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/76345341567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/job_order_costing_problems_and_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5842/9089/files/jikomerur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tagitigupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6750/6845/files/66461449779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/34383188273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7480/5148/files/check_yes_juliet_lyrics.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_off00007fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEC 5840 bytes
SHA-256: 53d15ca948ffea3c30df72da7f51495f8ba8bb17cfed454d90e3ec6664c8428b
font_01_sfnt_off000093e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E6 10652 bytes
SHA-256: cef3e325d843c156f162d8586a19e2699dd7536c906d55d2cf151483c9ce4465

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