Malicious PDF — malware analysis report

Static analysis result for SHA-256 825402d93f0d0ea8…

MALICIOUS

PDF

51.3 KB Created: 2020-08-22 01:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ded800cdfc20c7a1c01df0c26b565981 SHA-1: c838307e0828e83099dff76de7db44e4d3b82fde SHA-256: 825402d93f0d0ea812e2e0c7577a1eed9f6df1dd5c70ca29d01c910b5fb16c44
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with a critical heuristic firing indicating a redirector link to 'ttraff.com'. This suggests the document is designed to lead users to malicious sites, likely for phishing or to download further malware. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of redirector links is a strong indicator of malicious intent.

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.com/pify?keyword=younger+brother+in+korean+formal In PDF document text
    • http://files.madtownrent.com/uploads/1/3/2/8/132815365/mafinadoxuvire.pdfIn PDF document text
    • http://files.lookingbacklineage.com/uploads/1/3/1/4/131453401/2d2aa.pdfIn PDF document text
    • http://kekanovam.talkinghardwood.com/uploads/1/3/1/0/131070389/tuvusokeganari.pdfIn PDF document text
    • http://files.harponwight.co.uk/uploads/1/3/0/7/130739971/mudetolodoxelu-supajiku.pdfIn PDF document text
    • http://gajologeb.redhawkcommunity.com/uploads/1/3/1/8/131860479/ropupina.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/1/0435/2226/1143/files/portal_2_voice_lines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/93275336471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7452/6870/files/user_registration_form_css_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6731/8167/files/feasibility_study_on_broiler_production_in_the_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7593/5134/files/food_handlers_certificate_final_exam_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2601/6424/files/tanivaxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/melowonirof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2506/2298/files/39344276681.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/81825757078.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 7340 bytes
SHA-256: 0ecbc303cb0f1d3e4eb99f6bdfb74551fd891fc19d706d625189eb226198b6ff
font_01_sfnt_off0000760a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760A 5168 bytes
SHA-256: 098cd4d5fc2aefe8fb2eaf7b2b50ecf8d785ec17e5678efef031ae141dba674d
font_02_sfnt_off0000877a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877A 10064 bytes
SHA-256: 9c067f2301ea726fc23f8f772806c55210ea57ecd160c57c2d234506583f983d
font_03_sfnt_off0000aa30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA30 16340 bytes
SHA-256: ee51351c9eb8c6a9dbff1bb743467f39bbaa64eee970481c040e8f02c1ffc4b8