Malicious PDF — malware analysis report

Static analysis result for SHA-256 722c03dd1acca611…

MALICIOUS

PDF

38.9 KB Created: 2020-08-15 08:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67d0c4451245d91d5a59e78b49e53847 SHA-1: 700990404bd5a7a58c8b143291f10741149edc4a SHA-256: 722c03dd1acca61180e656ea44db5486895333ff86604f545b6efae5a7be163d
162 Risk Score

Malware Insights

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

The PDF contains a lure for 'Malayalam movie 1080p hd video songs' and embeds numerous links, including one to a known malicious redirector at `https://ttraff.ru/pify?keyword=malayalam+movie+1080p+hd+video+songs`. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent. The document likely serves as a link farm to distribute malware or phish for credentials.

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.ru/pify?keyword=malayalam+movie+1080p+hd+video+songs
    • http://files.rivermenrodandgunclub.com/uploads/1/3/2/3/132302973/nomegariwutok-wibiwu-visinatixubuj-sojimuta.pdf
    • http://files.tikibooparties.com/uploads/1/3/2/7/132710780/vabura.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/81428207007.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/kupironedebisoxalurupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/92230942551.pdf
    • https://cdn.shopify.com/s/files/1/0434/4178/2946/files/73057414046.pdf
    • https://cdn.shopify.com/s/files/1/0438/0547/4978/files/fuxijuzivot.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5506/files/nalidefeberevosoponel.pdf
    • https://cdn.shopify.com/s/files/1/0429/4865/7311/files/97283814586.pdf
    • https://cdn.shopify.com/s/files/1/0428/2135/3635/files/nokurinijilob.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/52341720724.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/career_paths_medical.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/95436207014.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/kedulewejimotu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5499/6383/files/webpage_to_extension_firefox.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_off000056fc.bin
47393953440ccf7e5c1cbfb18f50f1fe617ef2e0b3df5254c551bd3969442a1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56FC 5832 bytes
font_01_sfnt_off00006acf.bin
72b4ccd033a4690a194d81bfcb1c50090ef258eec9adae72a4f772af178e929e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACF 10536 bytes

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