Malicious PDF — malware analysis report

Static analysis result for SHA-256 230d5f12e40718c9…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 23:31:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72ff70728336e4ad1c88cc2a71801570 SHA-1: 1201a80a1dcf523e8dd3931ca941477d631410d8 SHA-256: 230d5f12e40718c95c4c548d0cd53a00ff0e137d1b07c346df7bf3c99a1c43bd
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=advanced+systemcare+for+android+phone', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to system care software, suggesting a lure to entice users to click the malicious links. No scripts were extracted, and the primary malicious activity appears to be the redirection via the link farm.

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=advanced+systemcare+for+android+phone
    • http://files.deltabassclub.com/uploads/1/3/1/4/131438784/mubim.pdf
    • http://files.leevalley.org/uploads/1/3/0/9/130968996/2942434.pdf
    • http://lufef.asahi-kasei-k2019.com/uploads/1/3/2/7/132740900/rebomefebajimor-fufed-razute.pdf
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/34811119748.pdf
    • https://cdn.shopify.com/s/files/1/0441/2211/2152/files/english_to_marathi_translation_online_file.pdf
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/javisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/pdf_to_dwg_converter_zamzar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/66190123428.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/kalimat_ambigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/nginx_access_control_allow_origin.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/zefuboluwunejuzik.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/xusanitofezodokotepawed.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_off000061ec.bin
ab1b8e6dfa66b75ed37ec7d6038d53be039657dc0262f079621669a03f0047a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EC 5512 bytes
font_01_sfnt_off00007481.bin
4b214adf59f452b7f93de947386fb9a526e4b1ff0f24c89367d95a7093ef2625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 9664 bytes

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