Malicious PDF — malware analysis report

Static analysis result for SHA-256 6313620b2977df39…

MALICIOUS

PDF

48.8 KB Created: 2020-08-12 09:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8003f62dddef9b4941a1ab2a4023b668 SHA-1: 062758981904438b48bb31526dee5144ef5aaf66 SHA-256: 6313620b2977df395ed7270e1efc633443141d8f3c3d58a4ebb87192e964d06a
162 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, contains text that appears to be a lure for a 'PDF.js canvas example' and includes a malicious URL. This suggests the file is designed to redirect users to malicious sites, likely for phishing or malware distribution.

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.+js+canvas+example
    • http://files.mrscbiology.com/uploads/1/3/1/0/131070374/sewovomujugatev_lanajigo_zajajilewu.pdf
    • http://files.minimiel.com/uploads/1/3/1/4/131453028/dfd014069.pdf
    • http://lowanelab.danieljsheehan.com/uploads/1/3/2/6/132683403/xigubobamepuro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/malaquias_hernandes_dias_lopes.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/lusipufana.pdf
    • https://cdn.shopify.com/s/files/1/0431/7849/2072/files/74324229892.pdf
    • https://cdn.shopify.com/s/files/1/0434/8660/9573/files/tugorajig.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/pl_sql_programming_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/reading_and_writing_shs.pdf
    • https://cdn.shopify.com/s/files/1/0431/2953/6676/files/74312236286.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/34606266401.pdf
    • https://cdn.shopify.com/s/files/1/0433/4934/4421/files/65032389398.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/podufa.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/largest_palindrome_product.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006196.bin
3d36b1e80bfbc1502c98f12e16abb5ced882ea0e3fddc6f3619bd86cb6e6f20f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6196 4992 bytes
font_01_sfnt_off00007284.bin
29c7e449aef6060f7c037e7aac8519be2e5e6885f508b453f49131d3e44d17a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7284 5444 bytes
font_02_sfnt_off00008158.bin
df568cc03689a1e35c801128c792579c91178b8ecc9de4b6e3059f261ebd07da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8158 11960 bytes
font_03_sfnt_off0000a823.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA823 4324 bytes

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