Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d10a91488d1498d…

MALICIOUS

PDF

61.0 KB Created: 2020-08-04 13:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 997049a0c035dadce527fd46782b9ec0 SHA-1: efbde03cf77590c2061052bb3a18c2d81881c30f SHA-256: 5d10a91488d1498d51fadecceb66be605c7281b7b902b65f0336ed6714dc11ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. Crucially, one of the initial links, 'https://ttraff.cc/pify?keyword=cracking+the+code+of+life+worksheet+pdf', is identified as a malicious redirector. This indicates the document's primary purpose is to funnel users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.cc/pify?keyword=cracking+the+code+of+life+worksheet+pdf
    • http://files.susannahjbell.com/uploads/1/3/2/6/132695388/wokaxim-ramisenazadive-rutabavukebat-runudemu.pdf
    • http://files.mamdouh.co/uploads/1/3/1/0/131070561/fapibawunanozorezi.pdf
    • http://files.hublerfamilybusiness.com/uploads/1/3/1/4/131409909/156359d05.pdf
    • http://files.trogonheights.net/uploads/1/3/2/6/132696048/4719298.pdf
    • http://files.homesteadfed.com/uploads/1/3/1/3/131379183/e91060.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/favaralegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0255/1716/files/sofex.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/watiledaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/6457/3593/files/8230492958.pdf
    • https://cdn.shopify.com/s/files/1/0448/1895/6448/files/codes_for_deadly_sins_retribution.pdf
    • https://cdn.shopify.com/s/files/1/0440/7325/5062/files/61710614334.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/generals_io_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0438/3604/7522/files/82710648636.pdf
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/11458750079.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/bubufapilusul.pdf
    • https://cdn.shopify.com/s/files/1/0427/9389/4044/files/base_de_datos_mysql.pdf
    • https://cdn.shopify.com/s/files/1/0433/9227/0494/files/55360233886.pdf
    • https://cdn.shopify.com/s/files/1/0430/3981/7890/files/mafokutonuleviwuvi.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b086.bin
1436dd6f163bfe9cbd6f94b546ca637876ccb5f1d10f8298ebf233d887458c6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB086 5476 bytes
font_01_sfnt_off0000c337.bin
daf53256004a43682e3ff6e2d127c480bead2d7c6490a93fa7523561dfe55a14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC337 10400 bytes

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