Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a62233413d6eab…

MALICIOUS

PDF

56.0 KB Created: 2020-08-24 05:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 711cf6b6d3047f6bd13b7043aca50832 SHA-1: a012bbc0434d4cce2cc110298d49afd9f69a336c SHA-256: 34a62233413d6eab4a46707543990a92da3138eab0f96aebd42c1e0c6a2a39d5
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains strings related to 'Microsoft visual c redistributable 2005 x64' and a URL, suggesting a lure for users seeking software. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, further supporting a malicious redirection attempt.

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.cc/pify?keyword=microsoft+visual+c+redistributable+2005+x64
    • http://files.nilessteamroom.com/uploads/1/3/2/6/132681028/4715188.pdf
    • http://files.hollygrovebands.com/uploads/1/3/1/3/131379540/xubolalidon_kebuxuj_koduvukex.pdf
    • http://files.leeplazashopping.com/uploads/1/3/2/6/132681448/kagibamixubis.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9854/files/61779718333.pdf
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/96344848444.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2070/files/gematunef.pdf
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/53740552519.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/aciduria_metilmalonica.pdf
    • https://cdn.shopify.com/s/files/1/0431/9513/8208/files/potubagibedo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4604/files/colt_1903_pocket_hammerless.pdf
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/jamaxinisibevi.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2460/files/university_of_cambridge_logo_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/motojepesusox.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/joins_foxit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2037/8524/files/internet_cafe_business_plan_template_doc.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_off00009025.bin
8955c3b4785091497c343651df97c6f86561bf78bc709a0fb66a63d47e469d85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9025 5928 bytes
font_01_sfnt_off0000a472.bin
87b2123ec3c607c57a99ab0945b94c266e861263064998fe2a9dc75eec7c50fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA472 13720 bytes

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