PDF malware analysis — malicious · aad88e279d14d98a

MALICIOUS

PDF

45.4 KB Created: 2020-08-30 10:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0239dc0bbc201209dbc44e2c2580a2cb SHA-1: 1d208c190b2d5e9a83f2cc1f52cff24b06c29d4a SHA-256: aad88e279d14d98a7c9aa3041d49e622e4ca1b87fa4d228cb8e6b441740ea9ea

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is used in conjunction with a lure related to 'Lakshmi pooja vidhanam in telugu on diwali'. The document body also contains this URL and numerous other links to PDF files hosted on 'static.usrfiles.com', indicating a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a seemingly innocuous document, directing users to a 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.cc/wix?keyword=lakshmi+pooja+vidhanam+in+telugu+on+diwali
- https://static.usrfiles.com/ugd/e3ed1f_b09f94db670444d388ad2627704524fe.pdf
- https://static.usrfiles.com/ugd/b8c837_73dfdb07c00641189e673e1cfdbd9d78.pdf
- https://static.usrfiles.com/ugd/191a6d_a85af8321c7a4afca7fbeac0de31b6f6.pdf
- https://static.usrfiles.com/ugd/b8c837_256face7412840ebbca2064dbaf5c13f.pdf
- https://cdn.shopify.com/s/files/1/0430/5613/6341/files/xitijefuxu.pdf
- https://cdn.shopify.com/s/files/1/0440/5549/4806/files/tournament_bracket_generator.pdf
- https://cdn.shopify.com/s/files/1/0429/3020/8924/files/54750111976.pdf
- https://cdn.shopify.com/s/files/1/0428/1031/0822/files/53372386846.pdf
- https://cdn.shopify.com/s/files/1/0432/9232/8104/files/rebojunaxojimaner.pdf
- https://static.usrfiles.com/ugd/f7fbc8_3c0580cfa46e4e96ac41363addfb056a.pdf
- https://static.usrfiles.com/ugd/b8c837_4b8a730416c1414e995425324dbf415b.pdf
- https://static.usrfiles.com/ugd/b8c837_69fe03376c6847e08045daf54c459169.pdf
- https://static.usrfiles.com/ugd/c0b427_06b14a22047644ae848c5f30b600de1b.pdf
- https://static.usrfiles.com/ugd/b8c837_ed579ad385854d5c88d434ac03084648.pdf
- https://static.usrfiles.com/ugd/7baf93_422f08951fbf4c548294d6bcf2177e6b.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_off000065bd.bin` `f9125f544b3c50d2d73b63ddf8c810cfdb14f271fdc1c02d343261131e87eb9f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x65BD	5512 bytes
`font_01_sfnt_off00007877.bin` `69281f784530ac973c477e66c3424fb96f20f77b5093a7b1a1ec1c99837f842a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7877	10076 bytes
`font_02_sfnt_off00009b1d.bin` `24d56fdff7b413c1ec671c7cf61e4e6e2c41603e2b5e3647ebbc3d12a446eea6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B1D	3300 bytes

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