Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d6e59e2fa718cd…

MALICIOUS

PDF

49.0 KB Created: 2020-08-08 19:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39ba81ebe14356fde32d7bb98969cf96 SHA-1: 120cb8599ca55931a6b8f5c3ab783bf97befbfde SHA-256: d6d6e59e2fa718cdfa5752b27cafb61b0c5aa1e49d31703a7c63a9db0fbc65a9
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector URL being `https://ttraff.cc/pify?keyword=grafomotricidad+abecedario+para+imprimir+pdf`. This indicates a likely SEO poisoning or phishing attack, aiming to lure users to malicious sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of its harmful intent. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=grafomotricidad+abecedario+para+imprimir+pdf
    • http://files.wetproposalapparel.com/uploads/1/3/1/4/131452989/16cc2e4.pdf
    • http://files.cmsreads.com/uploads/1/3/2/6/132682745/470f9.pdf
    • http://files.ariannasportfolio.com/uploads/1/3/1/3/131379290/walonarun_wejetavuz_lopoxidovujido_bepivatag.pdf
    • http://files.sdftc.org/uploads/1/3/1/4/131453543/wugadadon_nesumoz.pdf
    • http://demoxum.amityhealthcentre.com/uploads/1/3/1/3/131380429/bebisik_rotesuduboso_nuforuzakojubug.pdf
    • https://cdn.shopify.com/s/files/1/0432/0827/8171/files/44308264443.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0445/files/bull_zip_writer.pdf
    • https://cdn.shopify.com/s/files/1/0444/1836/7654/files/c_form_application.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/cookie_clicker_golden_cookie.pdf
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/46490363271.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/current_affairs_of_august_2020_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/wotezunafote.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6607/files/beyonders_a_world_without_heroes_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nozawilod.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/81953081801.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/litoguwekuxowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/60622456566.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5360/files/71230495509.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.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_off00007e42.bin
c21c2acb55936d4f8e40a53f546fd5ff3054b0be661263544b752a036931c629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 5264 bytes
font_01_sfnt_off0000900f.bin
e5c7b499adb97bd2dd60fa069dec227b716d07d18319ef5593a44e2a0a6cad74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900F 11364 bytes

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