PDF malware analysis — malicious · ba418d04a5a7a6ff

MALICIOUS

PDF

53.2 KB Created: 2020-09-01 10:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9f02834d4589eba14493eb6dd4f6982e SHA-1: d4cf9dc85c906b1ca3571b8eff18dc00ea723d95 SHA-256: ba418d04a5a7a6fff44db5fdca9143f477114b371648bfa1fb85b91af23a28e0

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, suggesting a link farm for SEO poisoning. The ML classifier strongly flagged this PDF as malicious. The document body is heavily obfuscated but contains the malicious URL.

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.me/wix?keyword=paramphistomum+microbothrium+pdf
- https://static.usrfiles.com/ugd/01bc73_cc446efd13c34b388b1c629b2ffa1abe.pdf
- https://static.usrfiles.com/ugd/868401_bc0e6c8867ff406dbe1bd8bb9fa20968.pdf
- https://static.usrfiles.com/ugd/b8c837_362636c542d14cf99d234a49f50086fc.pdf
- https://static.usrfiles.com/ugd/b8c837_15e92f99d0184713afe8be59e0e5d453.pdf
- https://static.usrfiles.com/ugd/724fb5_76cde7e5f30f444c944968a98219b7f5.pdf
- https://static.usrfiles.com/ugd/3e9e83_27912150e35b45d5bceeee2fe760eaf5.pdf
- https://static.usrfiles.com/ugd/e4a001_955c6c6dee934e39a2739e9624ed997c.pdf
- https://static.usrfiles.com/ugd/b8c837_29cc4f099a0f4d629efbc9cdbdbc87e2.pdf
- https://cdn.shopify.com/s/files/1/0434/2402/2677/files/28666913877.pdf
- https://cdn.shopify.com/s/files/1/0433/2906/1014/files/kujokase.pdf
- https://cdn.shopify.com/s/files/1/0430/2451/5229/files/43781368411.pdf
- https://cdn.shopify.com/s/files/1/0428/7424/1187/files/dimoganuma.pdf
- https://cdn.shopify.com/s/files/1/0437/1418/3323/files/kexajegi.pdf
- https://cdn.shopify.com/s/files/1/0463/5249/8850/files/patuwabufarezetalafida.pdf
- https://cdn.shopify.com/s/files/1/0435/1095/6196/files/xodojedututazilomawunonef.pdf
- https://cdn.shopify.com/s/files/1/0433/0595/9588/files/98267193818.pdf
- https://cdn.shopify.com/s/files/1/0432/6319/7347/files/xozozubavak.pdf
- https://cdn.shopify.com/s/files/1/0431/3733/5464/files/pilolunupexenapelemuxefe.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00009193.bin` `3b3fe56f1df4bfc681820c81bbc30323b6787645149b4dffedff9f078e666838`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9193	5504 bytes
`font_01_sfnt_off0000a415.bin` `02e877d7453f3519485fe32e474fe47c4506f347a59bd6c4142cae088afe8b2d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA415	10404 bytes

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