Malicious PDF — malware analysis report

Static analysis result for SHA-256 791fdf3ea320635a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-04 03:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8eed1633f8281ad94a0a2732e6f53d4 SHA-1: 3525c472a46a63ee616407eec04b700f5f1e9e52 SHA-256: 791fdf3ea320635a32a32ec875635ac2b02ec3f6fa6154907427749cbfb88f02
202 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as exam paper downloads, but they redirect to malicious infrastructure. The primary redirector URL is `https://ttraff.cc/pify?keyword=ctet+july+question+paper+2020+pdf`, which is flagged as malicious. This indicates a phishing or scam attempt leveraging a fake download lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=ctet+july+question+paper+2020+pdf In PDF document text
    • http://files.waiheelimu.org/uploads/1/3/1/6/131607174/nomuvawezilamaranu.pdfIn PDF document text
    • http://files.forestparkestateshoa.org/uploads/1/3/1/4/131437222/muzikubawosuvuzizi.pdfIn PDF document text
    • http://meluw.covrha.com/uploads/1/3/1/4/131438464/sugugo.pdfIn PDF document text
    • http://files.saintsandscholars.org/uploads/1/3/1/0/131070291/xisibibi.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/1/0441/4016/7320/files/26324614998.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/57313948903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/lunafaverorabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8981/1861/files/nupasiserodaxegibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/34375057716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/warowoboderelitufogupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/mokedologexigudogudaguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/radasibemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/1234052951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3067/3565/files/sabezabivuminis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/ledoxif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0080/7070/files/wulug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6059/1776/files/23156060337.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 5516 bytes
SHA-256: af98770ae28a4d45e7a63d7c76e78ecd32726f4a0263ed02ec926a5e9e60bde4
font_01_sfnt_off000074e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E1 10120 bytes
SHA-256: 3e7ae5389aeb1e43b94dafd1da0b428288b1ebdd42ebf01df54d60c08b172270