Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ac65dbc9606b44…

MALICIOUS

PDF

41.9 KB Created: 2020-08-06 19:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a32c1ee38b36c1e32eefcb60279021e0 SHA-1: 80bd8ead6a9c45b0c58489a708894b920f760167 SHA-256: a4ac65dbc9606b449a1f8e1f5bbe89c52cf2368293174475171d1de70d97d838
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector pointing to 'ttraff.com'. The document body, though partially corrupted, includes text related to health statistics and the wkhtmltopdf tool, suggesting an attempt to appear legitimate for SEO poisoning. The primary malicious link is 'https://ttraff.com/pify?keyword=prevalensi+penyakit+jantung+koroner+menurut+who+2020+pdf', which likely leads to further malicious content.

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.com/pify?keyword=prevalensi+penyakit+jantung+koroner+menurut+who+2020+pdf
    • http://files.customerfocusedlearning.com/uploads/1/3/0/7/130738814/bavajesapamukogobos.pdf
    • http://files.crystalriverpublishing.com/uploads/1/3/1/3/131381804/1447262.pdf
    • http://files.applestar.org/uploads/1/3/1/4/131437702/savobukibekeduf.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/segokirufexevudofaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/mugiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9447/files/minecraft_psi_tutorial_spells.pdf
    • https://cdn.shopify.com/s/files/1/0429/4161/2199/files/22706193369.pdf
    • https://cdn.shopify.com/s/files/1/0428/2905/4118/files/87874966923.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/array_of_colours.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/38145253790.pdf
    • https://cdn.shopify.com/s/files/1/0435/7554/1919/files/necromancer_5e_class.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/43215083303.pdf
    • https://cdn.shopify.com/s/files/1/0438/4686/0960/files/a_scanner_darkly_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8246/files/65622206061.pdf
    • https://cdn.shopify.com/s/files/1/0433/9164/7894/files/mofifote.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_off00006314.bin
3c3eb3b1669dc077530ff332cc76078d62ff6bca6ea46a895b67a4be3d999313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6314 6124 bytes
font_01_sfnt_off000077eb.bin
84d7d5e0e173f34c2d425f16d923819eb24daa3c7d2870357ab23771cd92391d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10080 bytes

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