Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c33821e3b476a8…

MALICIOUS

PDF

44.9 KB Created: 2020-08-13 14:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04648864a9c9f3573bb9686835e3a120 SHA-1: d0591aee43e2c7058d869ebaba1aba5000de2b5f SHA-256: 24c33821e3b476a8c2ab1fc4af742e5d9a3fe5e96d6f617635ccb957e159adc4
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm designed to improve search engine ranking for malicious content. The primary link directs to a known malicious redirector, 'ttraff.ru', disguised as a financial risk book. This suggests the document's purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=riesgo+financiero+pdf+libro
    • http://jigude.jerryandwen.com/uploads/1/3/1/0/131069991/9697319.pdf
    • http://juwozu.seanhuttonmusic.com/uploads/1/3/0/7/130738792/773135.pdf
    • http://files.sig22neuroeducation.com/uploads/1/3/1/4/131482915/jogabujop.pdf
    • https://cdn.shopify.com/s/files/1/0437/9397/3405/files/sanuduwijejofatazarawil.pdf
    • https://cdn.shopify.com/s/files/1/0433/9426/9333/files/6148728412.pdf
    • https://cdn.shopify.com/s/files/1/0429/7008/7587/files/wopogalufiwimu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/application_letter_sample_for_fresh_graduate_accounting.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/piladumosoxasapisenegege.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/49914621637.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/male_catheterization_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/jivuriwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2019/7789/files/handbook_of_modern_bakery_products.pdf
    • https://cdn.shopify.com/s/files/1/0429/8326/0314/files/body_language_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3532/8661/files/worizuvazowutusebiwolulab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4295/files/pawumenakabafapoweziwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/17787171681.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_off00006ea9.bin
e3ec7fad5286c4ef6a9f274cdbd27d6aef7c3c4858d0d8fde45217560741e913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA9 5472 bytes
font_01_sfnt_off0000814d.bin
3597d6a08a6396db8cc5c308c121fa3413d9d64bb515955c1e697343ddf507b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 11052 bytes

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