Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e41e336dedf94c2…

MALICIOUS

PDF

51.8 KB Created: 2020-07-16 21:38:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9955f94671e0c0969070957392b98dd4 SHA-1: f2ed765f70b3a55312e8bd60ce8be4ca5b44822c SHA-256: 0e41e336dedf94c29b4b5f628754d4479e71e64bd952110251759c13bd905a03
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains keywords related to file conversion, suggesting a lure. The presence of numerous embedded links, many pointing to Shopify domains, further supports the idea of a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wb?keyword=microsoft%20word%20file%20to%20pdf%20converter%20free%20download
    • http://files.tynksgemstonedesigns.com/uploads/1/3/2/7/132740415/7381d2f1749d4.pdf
    • http://files.careerplanninghomepage.net/uploads/1/3/0/9/130969082/9449001.pdf
    • http://files.seirkieransns.com/uploads/1/3/2/8/132814239/leferijemitup-kifiravubixede-lidub.pdf
    • http://files.clinicalsupervisor.org/uploads/1/3/2/6/132681634/jorudaluposidifuwiz.pdf
    • http://files.thegreatpumpkinproject.com/uploads/1/3/1/8/131871994/776acbcd0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/31775805043.pdf
    • https://cdn.shopify.com/s/files/1/0428/9177/2063/files/dagibitobab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://suzixukez.files.wordpress.com/2020/07/10116379515.pdf
    • https://rogofuxeviso.files.wordpress.com/2020/06/83759103632.pdf
    • https://julabifefo633366968.files.wordpress.com/2020/06/9975359164.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/38756220822.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/zutipijav.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/pirazatevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/6981/files/55622680218.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/26559354299.pdf
    • https://cdn.shopify.com/s/files/1/0433/7857/3464/files/63262184466.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/23440249756.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/megolevejedurafoxekeviz.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_off00007e68.bin
bacaf5a03b7b5a3f5909789407d71d74133b4674012a1b815c99b34807d3d7b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E68 5096 bytes
font_01_sfnt_off00008fd9.bin
2c140bb1394f69348f6342336a70a92183f49b31c0a26cc79d1ebeaf14e17433		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD9 22256 bytes

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