Malicious PDF — malware analysis report

Static analysis result for SHA-256 f147ef61f7770604…

MALICIOUS

PDF

57.3 KB Created: 2020-08-03 14:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcba2fb01cdb5759f0ae55896f895398 SHA-1: bdac720b1858dcf22e4745bc1668ccc76516e356 SHA-256: f147ef61f77706043c14015fc5f16c345798e8e6316ff91beb5cb8d2dc8ce451
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=rule+96+of+cgst+rules+2020+pdf'. This URL is likely used to lure users into downloading further malicious content or phishing for credentials. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or to obscure the true malicious destination.

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.cc/pify?keyword=rule+96+of+cgst+rules+2020+pdf
    • http://files.peace-love-cupcakes.org/uploads/1/3/1/4/131438211/lewonofi.pdf
    • http://files.theresasegal.com/uploads/1/3/1/0/131069886/5b4e7283e3.pdf
    • http://files.shispa-benefits.com/uploads/1/3/1/0/131070367/9857876.pdf
    • http://files.shispa-benefits.com/uploads/1/3/1/0/131070367/98
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/74169572280.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/33980330848.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/30561992589.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/39850660240.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/77296192733.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/41394838282.pdf
    • https://cdn.shopify.com/s/files/1/0430/8746/2551/files/kanelorabofero.pdf
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/dukotobabulurexazixojuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/94083941842.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/sony_car_stereos_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/xoletiwuzumazoxalokogiwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/jefizorologanupixor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0297/files/apple_tv_kodi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009424.bin
8edf30b0c716164dfb8d6bb44251b9ec2fd1a19b199e4c22813c1613ba56da97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9424 5704 bytes
font_01_sfnt_off0000a7a5.bin
8ed2532eec00f5b6200ef7f3942dbce9be9c3d4cbd2ce1427eb99a9043ae07fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A5 9816 bytes
font_02_sfnt_off0000c98e.bin
a1d838d949f14e257e7aa3731047fb483a2501a6ce5b36a8cedfd7a33890ec18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC98E 3088 bytes

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