Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d23b74c9c4e7b2…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 04:22:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40f2cb396ccc9fd028af58653bd2fd5c SHA-1: 6813384cb399422deaa40c7c5ec14b05e9f7eee8 SHA-256: 65d23b74c9c4e7b26ba33dff20ccac1a66d8a33287fd7a948735816fb0d073a4
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL is https://ttraff.ru/pify?keyword=piramide+nutricional+vegana+pdf, which is associated with malicious activity. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking on these links under the guise of free downloads.

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=piramide+nutricional+vegana+pdf In PDF document text
    • http://files.christianleigh.co.uk/uploads/1/3/1/8/131871414/6128210.pdfIn PDF document text
    • http://files.atlantaicedanceweekend.com/uploads/1/3/2/8/132814241/0fab84.pdfIn PDF document text
    • http://widug.shouqalhudaif.com/uploads/1/3/1/4/131482995/nixifulukizezowojik.pdfIn PDF document text
    • http://files.ericasclassroom.com/uploads/1/3/0/7/130738700/d6a84389fd975.pdfIn PDF document text
    • http://files.humanresourcesolutionsllc.com/uploads/1/3/2/3/132303133/feduxemep.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/1/0428/9085/4566/files/wrightwood_ca_weather.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8843/5613/files/operational_amplifiers_theory_and_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/83324885060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5438/3782/files/consonants_sounds_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73792904944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9756/8920/files/child_psychology_books_free_download_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7700/files/banting_green_list_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/91784189673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/pabilatavudenuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/gafurusibuvoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9620/2661/files/break_even_point_in_economics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/62762945365.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 5360 bytes
SHA-256: fffae5a10d4b622d10fb724920341b4da23b9cadc14cdde80d82811a1d1427e4
font_01_sfnt_off0000715b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715B 2016 bytes
SHA-256: fa836470b372d4c002ef8114088cca77ed9eb1608b18e3547acf174aed6e4b89
font_02_sfnt_off00007ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC0 10036 bytes
SHA-256: 2f2dffc529601d10f56b6c920c7edb59bdba9e19de0c142a56fb5586e2b13b20