Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bab3b068d3ade74…

MALICIOUS

PDF

38.8 KB Created: 2020-08-11 21:10:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7fcdb7cbd3311d6e182a20310e6e4ed SHA-1: 816e3d8859f4d20623461676ac1ae4d9a9aaf30f SHA-256: 5bab3b068d3ade741f7c67f21e5bfcbedcfe8ef8371b6b253e1e47b57c2517a9
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, suggesting a phishing or scam attempt. It also hosts a large number of external PDF links, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs points towards an attempt to redirect the user to malicious infrastructure.

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=canceleria+de+pvc+pdf
    • http://files.florencejoelle.com/uploads/1/3/0/7/130775594/b1ab4554.pdf
    • http://rizujur.treatsicecreamparlour.com/uploads/1/3/0/8/130874277/kabevojuwotukol.pdf
    • http://files.lisatolin.com/uploads/1/3/0/7/130775982/067a816.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/7162/5634/files/bulunotikuzefonikon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91489653134.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/36872218439.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/31201209593.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/nizonepejejazijolanukapex.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9028/files/32258558648.pdf
    • https://cdn.shopify.com/s/files/1/0427/9179/6902/files/mesajude.pdf
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/aroma_rice_cooker_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/nulesobijigaxuxima.pdf
    • https://cdn.shopify.com/s/files/1/0429/7539/5993/files/rupelenipimoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/16559726590.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/aflatoxinas_en_cereales.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e3d.bin
8b0282b7fcc0c8fc723cab2fddc9f65290b0641685783ec0c70f50f567908a1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3D 4652 bytes
font_01_sfnt_off00005e15.bin
25bd20fd82b95e0e4cd382a27016cfe10f036c3771b4709b513a7efb900b2774		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 10084 bytes
font_02_sfnt_off00008092.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 4324 bytes

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