Malicious PDF — malware analysis report

Static analysis result for SHA-256 73850266e39e9f85…

MALICIOUS

PDF

62.9 KB Created: 2020-08-19 22:39:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3134fc5b7258cda45f4caf20a963650 SHA-1: e582b648e610259d2a06fc8a9dc3775eadf9d21e SHA-256: 73850266e39e9f85dc4ad8478416d117480963c7fb46066a5dfb93e530a99f1e
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirector infrastructure like 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a likely attempt to redirect users to a malicious site. The ML classifier strongly supports the malicious verdict.

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=eye+of+azshara+boss+guide In PDF document text
    • http://files.dbked.com/uploads/1/3/1/3/131381363/e86f003.pdfIn PDF document text
    • http://ramoxigib.suemurrayphotographer.com/uploads/1/3/1/6/131606490/06046cf93ea4718.pdfIn PDF document text
    • http://files.stantonmiddleschoolbands.org/uploads/1/3/1/4/131406448/adf79b9a4.pdfIn PDF document text
    • http://files.haylingchristiancentre.org/uploads/1/3/1/3/131380849/eed3fbca.pdfIn PDF document text
    • http://medasim.desertjudoaz.com/uploads/1/3/1/1/131164439/leworoleka_zezogimero_fuxizojeba.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/1/0437/5733/8776/files/bmw_r1150r_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/codingbat_logic-_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/theism_atheism_and_big_bang_cosmology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/automatize_tarefas_maantes_com_python_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/27140268444.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6440/7702/files/pearson_ib_biology_textbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/salexoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/66479309705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4202/8190/files/xuzilowilumoso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/free_bass_guitar_lessons_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/49124570891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/wijozebiketajivavidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/37872062231.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_off0000b8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F7 5388 bytes
SHA-256: a6b73cc50e4ace860d94970f727a65c5370b52098d060477b7b8616d77ca4365
font_01_sfnt_off0000cb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB55 10140 bytes
SHA-256: 8ea1765386b5468dcc9ffb808b93590b6df705ad6bf175165d0288b60487186d