PDF malware analysis — malicious · c681aba37e794e8b

MALICIOUS

PDF

45.8 KB Created: 2020-09-06 00:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ac883e441d47d09e35570c20e4873847 SHA-1: 64519ee83d37fe8fc724c05027c2e6557c513817 SHA-256: c681aba37e794e8b8d7e6c52c8134c7c2dab130040adb5ce810f6fd991872d4d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download for an "autotune rap voice changer apk". The document body and numerous embedded URLs further support the lure. The ML classifier strongly indicated maliciousness, and the PDF structure includes a link farm, suggesting an attempt to game search engines for distribution.

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=autotune+rap+voice+changer+apk
- https://static.usrfiles.com/ugd/a467d2_9238d086788741adb33b17c6c06b00c6.pdf
- https://static.usrfiles.com/ugd/89363e_921bb16342ba449baec9247c7e9486b2.pdf
- https://static.usrfiles.com/ugd/b8c837_b0aabbc553d042b99877955f06c725cc.pdf
- https://static.usrfiles.com/ugd/e1d12c_db943eee9a984b3a8d7676fd9d1ba27b.pdf
- https://static.usrfiles.com/ugd/ba2c19_aae76296297344f5886eca1699cd65f5.pdf
- https://cdn.shopify.com/s/files/1/0440/2960/8101/files/328810165.pdf
- https://cdn.shopify.com/s/files/1/0433/6723/5742/files/bertrand_russell_science_et_religion.pdf
- https://cdn.shopify.com/s/files/1/0436/5756/0217/files/72833065620.pdf
- https://cdn.shopify.com/s/files/1/0429/8620/9439/files/10581273137.pdf
- https://cdn.shopify.com/s/files/1/0432/6660/5211/files/legig.pdf
- https://cdn.shopify.com/s/files/1/0432/3393/5519/files/605374581.pdf
- https://cdn.shopify.com/s/files/1/0465/1584/7326/files/98771604075.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1741436775.pdf
- https://static.usrfiles.com/ugd/03dcd4_e78e5b5402c94c22a995972f28e428f9.pdf
- https://static.usrfiles.com/ugd/b8c837_fef08631cb184895a3de57d13cc79efe.pdf
- https://static.usrfiles.com/ugd/9cc572_740bf2cdd5f54120b6a4afd313d353a4.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00004f30.bin` `240ed36feb8f5b8854e7e449abc6386da9b5633e147805b9e0d72d156ff759f6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F30	11828 bytes
`font_01_sfnt_off000075a3.bin` `d3ffb17074247d3c16c21386929309637faa617d0fab6b9e063e10aca27f3929`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75A3	5100 bytes
`font_02_sfnt_off000086fe.bin` `2b3a890a9796713e1a0c0e5d613bfdb4de80641468f0f6483a9b5228caf941fb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x86FE	10164 bytes

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