Malicious PDF — malware analysis report

Static analysis result for SHA-256 be7bc58b9d2d8303…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 17:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c33821a944bf0babf62e644b78322a7 SHA-1: c56af10fe63a341f8d8e3f794d6dfb90f186363b SHA-256: be7bc58b9d2d83033459d858179727b98b22331e41f77db25fbc19918f7e11b1
120 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, specifically pointing to 'https://ttraff.ru/pify?keyword=canciones+con+acordes+de+guitarra+acustica+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also contains a link farm, suggesting an attempt to manipulate search engine results or distribute multiple malicious links. No scripts were extracted, but the presence of the malicious redirector URL is sufficient evidence for the attack pattern.

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=canciones+con+acordes+de+guitarra+acustica+pdf
    • http://files.roxysloclashnbrowbar.com/uploads/1/3/1/8/131858540/2258988.pdf
    • http://files.silenusentertainment.com/uploads/1/3/1/3/131382395/5b53ea54.pdf
    • http://files.kathleenlecoze.com/uploads/1/3/0/8/130813768/3418219.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/punegavusitenoge.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/dunapubasun.pdf
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/36032834481.pdf
    • https://cdn.shopify.com/s/files/1/0438/5724/8421/files/najorol.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/denotixutugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7265/1413/files/aws_solution_architect_certification_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/86099177017.pdf
    • https://cdn.shopify.com/s/files/1/0447/6777/2821/files/azazel_demonio.pdf
    • https://cdn.shopify.com/s/files/1/0439/2009/7448/files/vumokurixotilama.pdf
    • https://cdn.shopify.com/s/files/1/0437/3138/6529/files/children_s_cursive_writing_practice_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/85294839162.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_off00006570.bin
d4a37ba8f2fd1d9a14352ea7bf5ff0266e06f302ce941b4aad950bd006d6f4a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 5196 bytes
font_01_sfnt_off0000771e.bin
fb837d8d2e7b6ff876074993d1faa48c00f8652074d5e7b79bdb67b3eeb562c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771E 1888 bytes
font_02_sfnt_off00008031.bin
2a91541a36db2198a1654699deece52ea0da31beef6dd39a6b38b988451497a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8031 11012 bytes

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