Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd44f6898896b25…

MALICIOUS

PDF

32.5 KB Created: 2020-08-08 22:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b702b62687de57bbaaae7cf0ccd240b8 SHA-1: dd75e4279028c487e6f4a7e4e9f8e63d91433f50 SHA-256: 8cd44f6898896b256bc59e8a2bacdaf956484ecf83d6469b33c6b0ca94334e58
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a document about "jurnal bronkopneumonia pada bayi pdf". The document also hosts a large number of external PDF links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing users to malicious infrastructure via the embedded link.

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=jurnal+bronkopneumonia+pada+bayi+pdf In PDF document text
    • http://files.sportsplexlv.com/uploads/1/3/0/7/130775823/8159300.pdfIn PDF document text
    • http://files.peteraltschuler.com/uploads/1/3/1/0/131070820/8899320.pdfIn PDF document text
    • http://jarof.akchristiantraining.com/uploads/1/3/2/3/132303189/tunatekiwivel.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/1/0449/8879/2990/files/28662962493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6204/2529/files/sda_fundamental_beliefs_1872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/rogedojuxeginesezipuxoxoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/nukomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/fedap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/nobodunelesukuneribani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/huduma_number_application_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5293/3020/files/nubipadovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/honeywell_building_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/half_day_casual_leave_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0704/8860/files/48736412941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/2421945359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2478/4292/files/52947683846.pdfIn PDF document text
    • http://dx.doi.org/10.36679/kedokteran.v5i1.177In 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 6

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_off00004480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4480 5304 bytes
SHA-256: ae13d0fbfbd666fe0565183509721b805247e7e6776f8d9f197c737ed43d15af
font_01_sfnt_off00005681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5681 8992 bytes
SHA-256: 81ca4c7e9605bb30ef958eeff46a27b99291f0c6900fe0032c75e28c4850d077

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