Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae36d3e2074e7b0f…

MALICIOUS

PDF

45.5 KB Created: 2020-08-11 12:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d76e51b5d3181b9f59b3be68b780ca55 SHA-1: b5332ce1540e0de1c4fd38844ed3f9faa62c0fcb SHA-256: ae36d3e2074e7b0fb20307a641e68ea993068194447e1e4e5c61ec6607a737cb
152 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to a critical heuristic firing for a malicious redirector link. It contains a large number of embedded links, with the primary malicious URL being https://ttraff.com/pify?keyword=ingilizce+z%25C4%25B1t+anlaml%25C4%25B1+kelimeler+ve+t%25C3%25BCrk%25C3%25A7eleri+pdf. This redirector likely leads to further malicious content or phishing pages. The document also features a link farm, with many links pointing to shopify domains, likely for SEO manipulation to distribute the malicious PDF.

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.com/pify?keyword=ingilizce+z%25C4%25B1t+anlaml%25C4%25B1+kelimeler+ve+t%25C3%25BCrk%25C3%25A7eleri+pdf
    • http://mawakufa.edwinmclachlan.com/uploads/1/3/2/7/132710712/0ec8cad9c7e5a.pdf
    • http://fozes.cerebralwriter.com/uploads/1/3/1/0/131070872/081c012d52.pdf
    • http://files.fearless-compassion.org/uploads/1/3/1/4/131438616/3f256d7480302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zijilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/afrikaans_tweede_taal_begripstoets_graad_6_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0436/9694/7353/files/jeturusupusibametumuli.pdf
    • https://cdn.shopify.com/s/files/1/0443/1210/1020/files/business_communication_essentials_8th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/wutuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/allegory_and_representation.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/hakikat_tujuan_pendidikan_islam.pdf
    • https://cdn.shopify.com/s/files/1/0434/6114/8836/files/proform_treadmill_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/sigmoid_function_python.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/konica_minolta_bizhub_c227.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/literary_devices_in_poetry_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lofexunixepufatomubudabak.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_off00005eff.bin
dd6a05dc4d72c4534e39c0a8f6f16ea39d17cb8dcec3c96cdf2f3479761b02de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFF 5740 bytes
font_01_sfnt_off000071ff.bin
68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FF 1796 bytes
font_02_sfnt_off00007a8a.bin
60a316be01f085881ea5710330eb7d7b1a77658b258a91791def5b44f58d8e9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8A 14868 bytes

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