Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61f2cf6363cefb8…

MALICIOUS

PDF

46.8 KB Created: 2020-08-06 14:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b42f2aad1123f34279f6371be4cd00ae SHA-1: b0ddbcff0bd1ef5ba77616258c3e1b4d2cc61370 SHA-256: a61f2cf6363cefb806440c293163b88db5d96b91dcf2ce95334a4303ca10afc7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=pretul+nesocotintei+mary+balogh+pdf+download'. Additionally, it features a PDF link farm heuristic, indicating a large number of external links, many hosted on shopify.com. The ML classifier also strongly flagged this PDF as malicious. The presence of these indicators suggests the document's primary purpose is to lure users to malicious infrastructure.

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.ru/pify?keyword=pretul+nesocotintei+mary+balogh+pdf+download
    • http://files.jessejonesioofpark.com/uploads/1/3/2/8/132814071/5215711.pdf
    • http://files.cellobob.com/uploads/1/3/2/6/132681460/xozafavubuv_lekepamokirufi_gozuv.pdf
    • http://files.defendingthechristianfaith.org/uploads/1/3/1/4/131438471/rujijuzifiga.pdf
    • http://files.feralcatrecoverycentre.com/uploads/1/3/1/4/131406714/dfe2744.pdf
    • http://gevonami.clickitandcartit.com/uploads/1/3/0/7/130776487/78ef6533e2a515.pdf
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/3204455254.pdf
    • https://cdn.shopify.com/s/files/1/0430/2507/2282/files/74144158892.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/zixivilivavozajila.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1717/files/vawivosoxulapexazuropi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6529/3462/files/48749964037.pdf
    • https://cdn.shopify.com/s/files/1/0430/9906/2421/files/azotobacter_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/95685110986.pdf
    • https://cdn.shopify.com/s/files/1/0433/6504/0286/files/gezupupawaluladeneberonag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/lizisefitelonuvulifogaxum.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/42217671173.pdf
    • https://cdn.shopify.com/s/files/1/0429/9096/0799/files/d_d_dungeonscape.pdf
    • https://cdn.shopify.com/s/files/1/0429/4888/6684/files/87121551710.pdf
    • https://cdn.shopify.com/s/files/1/0436/5575/7977/files/82599462482.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/16717695476.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/download_amazon_kindle_books_to.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_off00006df1.bin
ab35dcb2069525b56f87b92318c8dcd0c7d696429eace6db3c8df9bb81a24981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF1 5904 bytes
font_01_sfnt_off000081e9.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E9 1800 bytes
font_02_sfnt_off00008a77.bin
7b02d44e0bc931d143980c04a6e83e918d4a0eba946d51bc61ae2eea7e7504f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A77 10012 bytes

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