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)
MD5: a3134fc5b7258cda45f4caf20a963650 SHA-1: e582b648e610259d2a06fc8a9dc3775eadf9d21e SHA-256: 73850266e39e9f85dc4ad8478416d117480963c7fb46066a5dfb93e530a99f1e
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to host or distribute further malicious content. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other PDF links, many pointing to benign Shopify domains, indicates a potential link farm or SEO poisoning tactic to obscure the malicious URL. No scripts were extracted, but the PDF structure and embedded link strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.dbked.com/uploads/1/3/1/3/131381363/e86f003.pdf
    • http://ramoxigib.suemurrayphotographer.com/uploads/1/3/1/6/131606490/06046cf93ea4718.pdf
    • http://files.stantonmiddleschoolbands.org/uploads/1/3/1/4/131406448/adf79b9a4.pdf
    • http://files.haylingchristiancentre.org/uploads/1/3/1/3/131380849/eed3fbca.pdf
    • http://medasim.desertjudoaz.com/uploads/1/3/1/1/131164439/leworoleka_zezogimero_fuxizojeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5733/8776/files/bmw_r1150r_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/codingbat_logic-_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/theism_atheism_and_big_bang_cosmology.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4829/files/automatize_tarefas_maantes_com_python_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/27140268444.pdf
    • https://cdn.shopify.com/s/files/1/0440/6440/7702/files/pearson_ib_biology_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/salexoso.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/66479309705.pdf
    • https://cdn.shopify.com/s/files/1/0436/4202/8190/files/xuzilowilumoso.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/free_bass_guitar_lessons_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/0839/3367/files/49124570891.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/famulogux.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/wijozebiketajivavidi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1054/6071/files/37872062231.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8f7.bin
a6b73cc50e4ace860d94970f727a65c5370b52098d060477b7b8616d77ca4365		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F7 5388 bytes
font_01_sfnt_off0000cb55.bin
8ea1765386b5468dcc9ffb808b93590b6df705ad6bf175165d0288b60487186d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB55 10140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.