Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8020281f3ba9c07…

MALICIOUS

PDF

74.0 KB Created: 2020-08-10 18:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa06992eb4a51b505e84e2fe9cde8d36 SHA-1: a74f8e40993c8f9760026fca49b488941af9957c SHA-256: c8020281f3ba9c071c5b520e4390576971232007de7c0b3cef8b0a5c435456c4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. This indicates the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting. The PDF also contains a large number of external links, suggesting a link farm or SEO poisoning tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=lagrange+s+mean+value+theorem+pdf
    • http://files.monikerfoundation.org/uploads/1/3/1/4/131454012/5b5017932a.pdf
    • http://files.jenkaki.com/uploads/1/3/1/4/131482941/kinerupatodalaga.pdf
    • http://files.swansonvideoservice.com/uploads/1/3/1/3/131381804/9691300.pdf
    • http://fukubudap.bqpublishing.com/uploads/1/3/1/0/131071021/aa839a1b87.pdf
    • https://cdn.shopify.com/s/files/1/0437/3318/8762/files/xununifa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8126/1466/files/48760297689.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5339/files/6970676970.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/catamenial_pneumothorax.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1356/files/34398710080.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78476378890.pdf
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/50486689917.pdf
    • https://cdn.shopify.com/s/files/1/0436/0028/1762/files/lomibizawoxujikonu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/koziz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6881/7569/files/jitaduxiledat.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000becd.bin
b3841b1c23de59842d0c8229af11b83af9784e7ab1bc9a1d06e1b5aa985ebadb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBECD 5456 bytes
font_01_sfnt_off0000d139.bin
7e1fb00b73d139a41e8f20aafb0257b893465bc107c482201d4868a56dd8936c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD139 15796 bytes
font_02_sfnt_off000102ad.bin
feb86654da44313fbca0b96430969f1ad862a1afc7a3d745d5aab2c8a72f0893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 16828 bytes

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