Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad385c66fdb3491a…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 06:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45ff15fe443c17121b72843735479cda SHA-1: a0aaa1091a70d17b105a680a29d0d25b7a329121 SHA-256: ad385c66fdb3491ac60509fc3f96d9a5dc1ccf46cfef361c47d824729ebd505b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including Shopify. One of the primary links, 'https://ttraff.ru/pify?keyword=peningkatan+kualitas+sumber+daya+manusia+pdf', is flagged as a malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to redirect users to malicious infrastructure. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the lure.

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=peningkatan+kualitas+sumber+daya+manusia+pdf
    • http://wawim.bvecpta.com/uploads/1/3/1/0/131070487/miwisepipofinev.pdf
    • http://files.thomasoudman.com/uploads/1/3/1/4/131407530/e860e3cbc.pdf
    • https://cdn.shopify.com/s/files/1/0461/9819/4325/files/21708229700.pdf
    • https://cdn.shopify.com/s/files/1/0433/6428/6618/files/24226895780.pdf
    • https://cdn.shopify.com/s/files/1/0435/0764/6630/files/pobodutiwafix.pdf
    • https://cdn.shopify.com/s/files/1/0452/5680/2461/files/can_t_battlenet_app_mac.pdf
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/97619853399.pdf
    • https://cdn.shopify.com/s/files/1/0434/6304/9376/files/95755745253.pdf
    • https://cdn.shopify.com/s/files/1/0429/1123/6259/files/wagolatebigigumubu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/nuwupaxome.pdf
    • https://cdn.shopify.com/s/files/1/0438/6534/2117/files/moluscos_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0441/2017/8840/files/macintosh_repair_disk.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_off00005fe1.bin
324b1e483627a33b5cce7274fc4cdcf95b9e1cd790ad7b39bbbb89f5aabe80d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE1 5440 bytes
font_01_sfnt_off00007243.bin
e956a1d57428ca1a05d7c9888bdb1090d93f4cf02f09bea81467bc8e35f75c50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7243 9864 bytes
font_02_sfnt_off000093f8.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93F8 4324 bytes

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