Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc174988f424c12b…

MALICIOUS

PDF

59.9 KB Created: 2020-08-07 15:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787893a854124801843febae1092ee24 SHA-1: a3028beba8b8cb99c8d74675bf16d973349a3af8 SHA-256: bc174988f424c12b2bdaa543efb2d6455b6a785dd3ce41ae9ef2e52ab2cd72a3
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=aprender+japones+romaji+pdf', which is identified as a malicious redirector. This suggests the document's purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=aprender+japones+romaji+pdf
    • http://files.ahgu.net/uploads/1/3/0/7/130739978/zinaladeg.pdf
    • http://files.l912f.org/uploads/1/3/0/7/130775953/1301858.pdf
    • http://files.gardeniacafeonline.com/uploads/1/3/0/7/130775659/6547816.pdf
    • http://files.bridgendtennis.club/uploads/1/3/1/3/131398134/fijananij_sorifiguzelu_wakitolasu.pdf
    • http://barav.magicboundtravel.com/uploads/1/3/2/8/132814930/ad7665bfb53cd.pdf
    • https://cdn.shopify.com/s/files/1/0429/9948/0473/files/67509978925.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/1194788180.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/sinosapemufidukajobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/ielts_reading_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/jenowajatovizubatil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7726/1729/files/62237183256.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/xalufomelekusevoxaporo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0127/2729/files/dulutexefepiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/21244101592.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/pajaguselebukibige.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d7e.bin
0c603c5e90f776ed647637a5920ebf55136b2f7dd6e195050f1535c1fea43a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 12740 bytes
font_01_sfnt_off00009732.bin
e94dd5c3c4f1ab911548ab4c49a217307d2386edaad13f378e3225e578ed7b7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9732 5220 bytes
font_02_sfnt_off0000a8e5.bin
71224acc3dfa13f001ccb950b57615d3fd294fb6dcdd88b75acb54ca40502bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E5 10392 bytes
font_03_sfnt_off0000cc4b.bin
975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4B 16312 bytes

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