Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bebcb2710ed69bc…

MALICIOUS

PDF

43.6 KB Created: 2020-07-29 19:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33024e46f0ace6228e6de6fb446fe97c SHA-1: 63582f7ead19e1be30aa997cfbdb299cf8125149 SHA-256: 6bebcb2710ed69bca4cd079946c7eb6bf5964d0f3570ad5c38f0503940b79dd9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirector link to 'ttraff.cc'. The document body, though heavily obfuscated, suggests a lure related to 'Prince2 Foundation exam' certification. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pdf+prince2+foundation+exam
    • http://files.saharasistasols.com/uploads/1/3/2/3/132303353/5189898.pdf
    • http://files.aakashsinghrathore.com/uploads/1/3/0/7/130740205/ab1717c1e72.pdf
    • http://files.myped15.com/uploads/1/3/1/4/131437249/xaziwoner_fezomabazadis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0445/9170/files/82241674809.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/65632692036.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/57467028896.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8968/files/wefuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/7439/6063/files/7099560603.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/mabanovivik.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0432/8413/6086/files/71528449009.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/46856265981.pdf
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/riwubitefurozobuserumumur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9593/files/bupevoloxavebifurerufo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gekisemegudifusoledo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/wokanugekakuminitotukibu.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_off00006cf4.bin
68817a8af8dde39f16456255d191bffcb84adbc2c816ee10a1a4fb144fe4b829		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF4 5176 bytes
font_01_sfnt_off00007e77.bin
b25063aa1406bf33698903c12a5ae51fec928fe6fb784d281c576cd4a741e114		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E77 10236 bytes

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