Malicious PDF — malware analysis report

Static analysis result for SHA-256 383f7bab8a5e4075…

MALICIOUS

PDF

43.1 KB Created: 2020-08-18 15:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dab8ef5975a2e32fb07f3ae609aeca80 SHA-1: 050d9b4d7e9e86b45034ba29b82b6d991399865c SHA-256: 383f7bab8a5e4075e4d54231db6c079d3c8296bb433611d11e4fb389affab7fa
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=laravel+carbon+format+change. Additionally, the PDF exhibits characteristics of a link farm, with numerous links pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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=laravel+carbon+format+change
    • http://gevijewe.mydivinewomb.com/uploads/1/3/1/4/131453329/nudironesarakedimu.pdf
    • https://cdn.shopify.com/s/files/1/0454/6635/3814/files/6271252479.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/sukitimafisa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7605/files/61001573098.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/gonowoxitorosawedukim.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/ayurveda_books_malayalam.pdf
    • https://cdn.shopify.com/s/files/1/0431/1279/2221/files/22066364872.pdf
    • https://cdn.shopify.com/s/files/1/0435/1882/0511/files/gigaware_usb_to_serial_driver.pdf
    • https://cdn.shopify.com/s/files/1/0440/8619/8424/files/1673186816.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/bevuzizefixosogewudaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8497/files/mabera.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/camozzi_pneumatic_cylinder_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/2855/3634/files/email_writing_tips_and_tricks.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_off00006183.bin
051e5b49679e57183772fb725cb0da468ed46d1eeabd46bd20445cbfb9c3e2f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 5260 bytes
font_01_sfnt_off0000734a.bin
dc1fd47cf316204718587e91009a88ae87d205be5e2fc736b02574f12d5abdd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x734A 13904 bytes