Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b7894033aae761…

MALICIOUS

PDF

41.6 KB Created: 2020-08-14 00:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ce699d5cdfc94f99c960f8089b0e5e0 SHA-1: ef7d5e6a7dc5cf9021495151038c37c6b3b03bd1 SHA-256: 90b7894033aae761cf73ca661d42013346b8afd2fa7bfe124a110dd2c5c87ad4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.ru/pify?keyword=inlet+guide+vanes, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be a lure for users interested in technical documentation. The presence of a link farm suggests an attempt to distribute malicious content broadly.

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=inlet+guide+vanes
    • http://dokepu.sungindustries.com/uploads/1/3/0/7/130738730/tudimepik_serogori_sazumelafinene_loxip.pdf
    • http://files.webdevelopmentbuddy.com/uploads/1/3/2/6/132681378/595917.pdf
    • http://files.sspeterpaulpassaic.org/uploads/1/3/0/7/130775784/5596887.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/xefugofavukej.pdf
    • https://cdn.shopify.com/s/files/1/0428/7060/3932/files/honda_cb750_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0444/4015/8374/files/efectos_del_alcohol_en_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/wekojekep.pdf
    • https://cdn.shopify.com/s/files/1/0433/7745/9365/files/20715392160.pdf
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/enhancement_shaman_7._2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baxumedufimoval.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/paseribufafudowikajev.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/gofijobajepawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/wunepibatawigaxasivopedos.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4307/files/bamu_university_time_table_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/mobezaj.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_off00006566.bin
0afa994197450fae011d74bd17d7cb15a92db5d72d05c0dbed38ac5878d57763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 4896 bytes
font_01_sfnt_off00007623.bin
8c1c174bfdc873e437bd867d451addf1d7a7ea452ccd5424eb1184c254ba4056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 10468 bytes

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