Malicious PDF — malware analysis report

Static analysis result for SHA-256 9513a7fc309a6254…

MALICIOUS

PDF

65.4 KB Created: 2020-08-07 00:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3aec7acf5229e9cad2771688c15e7ff4 SHA-1: 71283a74ddc34de47b8b8032e4266c0d739f2ac3 SHA-256: 9513a7fc309a625475b4efcafc9e0b1a07c8a24802e558aa7592ba99faf0e78a
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to 'https://ttraff.com/pify?keyword=akreditasi+puskesmas+bab+1+pdf'. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a mass of external PDF links, with 'https://cdn.shopify.com/s/files/1/0432/6470/4662/files/fps_counter_unity.pdf' being the first identified. The document body, though heavily obfuscated, contains text related to 'Akreditasi puskesmas bab 1 pdf' and the wkhtmltopdf tool, suggesting a lure to disguise malicious links as legitimate PDF content.

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=akreditasi+puskesmas+bab+1+pdf
    • http://files.peachyboho.com/uploads/1/3/1/3/131398573/wapiwerasebaj.pdf
    • http://files.ridefromyouth.com/uploads/1/3/0/8/130874254/gijuluw.pdf
    • http://files.ashasisson.com/uploads/1/3/1/8/131857756/sejulipamirirev-bebewivapogire-sosuwep-fibitokunil.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/fps_counter_unity.pdf
    • https://cdn.shopify.com/s/files/1/0430/1167/0179/files/rajogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/bezewosimixodosuvonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/83016437887.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/wurufazofebu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2233/files/pe_design_10_crack.pdf
    • https://cdn.shopify.com/s/files/1/0432/4048/9122/files/powiwawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7392/files/princess_fish_terraria.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/tobizukimuzovemufamom.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/21290428543.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.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_off0000c25e.bin
f46d519318635539e459d3b1867dd023a0daf800c5a9a9b7f97bc5b6added8ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC25E 5400 bytes
font_01_sfnt_off0000d4aa.bin
583aeb3ed46515535914868b70ecdae2987397f002f0481d66245f7481b9fdc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AA 10588 bytes

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