Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e014d8dbf6c82e9…

MALICIOUS

PDF

67.3 KB Created: 2020-08-02 05:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeb07f4e379ed880289a150f9ad945bf SHA-1: 5ad596142563ff6a7e22082a80180fc33da7b4ce SHA-256: 6e014d8dbf6c82e9f0180dee957fe48f7ff55e934531f5f42cea76870d855ae0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of a redirector URL suggests an attempt to lead the user to malicious content or a phishing site. The document body is heavily obfuscated and contains what appears to be junk data along with some URLs.

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/pify?keyword=ascii+flip+table
    • http://files.palmsprings-personalinjurylawyer.com/uploads/1/3/2/7/132740547/1484914.pdf
    • http://files.unitedfacemasks.com/uploads/1/3/0/7/130740401/xejamuwev-dunewuj-sovolakib.pdf
    • http://files.strategytitan.com/uploads/1/3/1/3/131380236/ab7563aff6.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.thdl.org/http://www.thdl.org/Tibetan
    • https://cdn.shopify.com/s/files/1/0430/4365/1741/files/rixupimuwudosilugera.pdf
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/96972093377.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/regetemalesipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3517/files/dozadobotaromela.pdf
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/kosegedi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2523/6121/files/68763956773.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/52219870985.pdf
    • https://cdn.shopify.com/s/files/1/0434/7225/7181/files/dibisekoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9037/8901/files/55775648415.pdf
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/47724185397.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fixasitisajixumazurezeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/66872131322.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
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.htmlTibetan
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a2d4.bin
4ffbedb197d6e8424fe8a14e8be066a669191873b7e69944bc04ff64dd3cde62		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA2D4 2196 bytes
font_00_sfnt_off00006852.bin
4b373296db5d3b174c152c67e2974ba28cca69c3179500648635918633f3952b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6852 6872 bytes
font_01_sfnt_off00007fe6.bin
a9bbaada7705e6ada8c0dbf9304ed78893180b06ee072f0f7d6304279027c3b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE6 5040 bytes
font_02_sfnt_off00009124.bin
07d0f9052e5eb7def2d4ee8ddcb8166c997d36c1233c1fb60dde6481f6de57a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9124 8904 bytes
font_04_sfnt_off0000acef.bin
a7d3bc6248a7721cefd2859a85e89aa63f983490d63b56941c5941418e11935a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACEF 16148 bytes
font_05_sfnt_off0000e016.bin
da650f0d116af80fd238050fee23770e86e785815a549eacf380de447fdca20e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 18412 bytes

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