Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23fc5147f1f47a2…

MALICIOUS

PDF

43.7 KB Created: 2020-08-21 20:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e019ec5dd26340d551d124226c2791a SHA-1: 9505d1f9cad37a45a36feb753db6fb2c051e4781 SHA-256: e23fc5147f1f47a21d977a1bc2983029c4cfe2697cc6e294ccc17d1b3f42af85
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm with multiple embedded URLs, including a critical redirector link to ttraff.ru. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to a malicious site. The presence of numerous links, many pointing to benign Shopify files, indicates an attempt to manipulate search engine results or distribute malicious content through a seemingly legitimate platform. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious 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=certificate+of+participation+template+publisher In PDF document text
    • http://files.education4fun.net/uploads/1/3/1/4/131438423/lugelizufedap_sezogibidubez_tukabuj.pdfIn PDF document text
    • http://files.windowsofatlanta.com/uploads/1/3/1/3/131398177/sisomim_pipixexiki_rokalipuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9353/9478/files/81232105262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1817/3086/files/56098971062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1480/2855/files/colouring_sheets_animals_hard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/4709146513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/zezijal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/14500205720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0709/0581/files/theory_of_automata_mcqs_with_answers_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/welanoguwajozowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3804/6365/files/21143649305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/kevexekaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3250/files/xekizarekuwaviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/beat_it_remix_ringtone.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
🗂 Part of campaign: education4fun.net 3 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 5300 bytes
SHA-256: 5c90d1e7980781b20a06f9397f7d6a266328f934f41c626177640aa0b77c9d39
font_01_sfnt_off0000724f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x724F 9732 bytes
SHA-256: cdc7567fe6f94e89b4a903b6896b0606d8e6cbda5137bf097979827808553186
font_02_sfnt_off000093ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93AD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3