Malicious PDF — malware analysis report

Static analysis result for SHA-256 8255561bdfadeef2…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 02:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 502002cd2a31349d2f33fdb85e765edc SHA-1: a405eb95e877aaba2ded3f9e4254a14189ec4550 SHA-256: 8255561bdfadeef2580b54b2b31a6369e79d4bd8391037290222d18b73d16caf
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=omnipage+ultimate+manual', which is flagged as malicious. Additionally, heuristics indicate a link farm and a lure to execute commands via the clipboard, suggesting a phishing or malware delivery attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/wix?keyword=omnipage+ultimate+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_7e7360412984469a97cd9c77fa8ca99b.pdf
    • https://static.usrfiles.com/ugd/b8c837_04eef45f742f4f87acb1d72b3f3c0026.pdf
    • https://static.usrfiles.com/ugd/b8c837_2556911f02764007aacff729e7e70393.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c185d7ccd894776b529c4e875233a88.pdf
    • https://cdn.shopify.com/s/files/1/0434/5459/5224/files/15226627706.pdf
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/lands_end_trail_map.pdf
    • https://cdn.shopify.com/s/files/1/0430/6554/0759/files/85846690677.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/26458226211.pdf
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/zerovedano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/49893706483.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/fekilakup.pdf
    • https://cdn.shopify.com/s/files/1/0437/1080/8213/files/structure_of_alcohol.pdf
    • https://static.usrfiles.com/ugd/b8c837_04bc38d6629049f2a9ed1c607aa7d445.pdf
    • https://static.usrfiles.com/ugd/b8c837_d959ab4ea29e44358bc3c9c5325339e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_c85ab3223f05432a9a2388f1a977e7db.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_off000076a3.bin
e9434c5c655dad932f9ff1f2a543b93a48ae5ed7c5579fdbe694471d229fad9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A3 4892 bytes
font_01_sfnt_off00008733.bin
94aac97b8c96b6a9c7ebe2e1e3525112d29237fad61da64a37f390728dee6fc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8733 10192 bytes

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