Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad129c7f419f280…

MALICIOUS

PDF

41.4 KB Created: 2020-08-18 19:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 322a9519f44cef51cd182890254e5ff7 SHA-1: 778494f6b2981cb6e6edb901df694521133d4d5d SHA-256: dad129c7f419f280d77177704b40e120771696d2c98ded2f6c167b846dbc48d2
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Habitos alimentarios en los ni os pdf' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of an SEO link farm, with many links pointing to Shopify domains, likely to manipulate search engine results.

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.com/pify?keyword=habitos+alimentarios+en+los+ni%25C3%25B1os+pdf
    • http://files.teloshospitality.com/uploads/1/3/0/8/130874122/b0581bd9.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/44279365290.pdf
    • https://cdn.shopify.com/s/files/1/0431/3825/2954/files/xadapuxavomawitifoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/5189/1358/files/bush_francis_catatonia_rating_scale_scoring.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/jojarap.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/xemafonumo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4235/5865/files/jidoniwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7161/8723/files/android_phone_with_barometer_sensor.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/96227703479.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/2015_toyota_sienna_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0512/files/tufafopezatukodokajibet.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/78068409119.pdf
    • https://cdn.shopify.com/s/files/1/0433/3997/2773/files/microsoft_excel_course.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/76268773429.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa3.bin
5ee7c29c376c9f7c9cc97069936b5e868896bb1cef3193e79024ff226642535b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA3 5500 bytes
font_01_sfnt_off000071eb.bin
e4a7ba35be84ab41da8941e552f99391902b94e4fbd2b40f8d1e1c99860cb65d
pdf-font-stream PDF embedded font (sfnt) at offset 0x71EB 11380 bytes