Malicious PDF — malware analysis report

Static analysis result for SHA-256 33b4265a2639f991…

MALICIOUS

PDF

47.4 KB Created: 2020-08-05 09:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba0a857bb0d63a0e4ab2261c832c866c SHA-1: c5b681bb373a9d22cf9e9261bb675ab587be8562 SHA-256: 33b4265a2639f991b16340f5ccd8b44b66188540f558a100c65e563011a52807
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, a technique often used for SEO spam or to redirect users to malicious sites. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifies a link to ttraff.ru, which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Bangla calendar 2020 pdf download' and the authoring application 'wkhtmltopdf', suggesting a lure to download a PDF. The presence of many Shopify URLs, some marked as benign, alongside the malicious redirector, indicates a link farm strategy.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=bangla+calendar+2020+pdf+download In PDF document text
    • http://files.ballaratorphanagechildrenshome.com/uploads/1/3/0/7/130739463/dekoboxi.pdfIn PDF document text
    • http://files.artofceremony.co.uk/uploads/1/3/1/8/131872178/7b72fe2b4162fd9.pdfIn PDF document text
    • http://files.broadwaysupplystore.com/uploads/1/3/1/4/131409309/sasafixa-xigopabowi-lumukebevozeko.pdfIn PDF document text
    • http://files.goacesfootball.com/uploads/1/3/1/3/131383424/6955055.pdfIn PDF document text
    • http://files.hoopspulse.com/uploads/1/3/0/7/130739027/xidijexe.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/1/0430/8893/7120/files/200349851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3056/1436/files/14268134891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5381/6728/files/13643936021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3198/5309/files/12645308849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/92436441225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6581/9814/files/37932066265.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/20546126911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/ss_bolt_tightening_torque_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/72087367130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/94486450650.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE9 5560 bytes
SHA-256: 2fdd1d67916ec16c0c439f4254355c67a17bd0c4c8c99f9542bb6912fed88bbe
font_01_sfnt_off000072f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 4888 bytes
SHA-256: c9ae5a18bd10a721bc6e3af02f3058d5623b610f7c80b8f2bd883ec92d9ab911
font_02_sfnt_off000082aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AA 1912 bytes
SHA-256: 219c50eb5f9de54547e75882c5791e81fccadeb83f743dbd1d6da3bbbca1c2be
font_03_sfnt_off00008beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEB 10492 bytes
SHA-256: 34af7b96fdaf3ac92113812d66410091bc094bafd4fff805642da613b6bac99e

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