PDF malware analysis — malicious · 27b7ebe8e0c57786

MALICIOUS

PDF

41.6 KB Created: 2020-09-01 13:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 205573907361069fe4c08f526e38252a SHA-1: fe6c47220de532701ff65f886666276892074b4f SHA-256: 27b7ebe8e0c57786559c1da944f4c4ac8fb217eefca8b5874ff9fc61f078933e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link disguised as 'Colon polyp treatment guidelines' which redirects to a known malicious domain. The ML classifier strongly indicates maliciousness, and the PDF structure includes a link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation for phishing. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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/wix?keyword=colon+polyp+treatment+guidelines
- https://static.usrfiles.com/ugd/4c1554_0f3ae5df241144049c1727ef44da0671.pdf
- https://static.usrfiles.com/ugd/78c764_075c857c805649cb920de6d2f31bfb5f.pdf
- https://static.usrfiles.com/ugd/5be868_7753c4fbc1f04d1e88e7878366d2d5fb.pdf
- https://static.usrfiles.com/ugd/c0fca2_cd0691093c9648edae06985754bd469b.pdf
- https://static.usrfiles.com/ugd/78c764_5a161c84dc9249b4ad9679c8646f1d03.pdf
- https://cdn.shopify.com/s/files/1/0432/5294/0968/files/kibanagolugawidemiduwunuw.pdf
- https://cdn.shopify.com/s/files/1/0433/9128/7450/files/nisas_wicked_perversions.pdf
- https://cdn.shopify.com/s/files/1/0431/7754/1791/files/jisexukobu.pdf
- https://static.usrfiles.com/ugd/6cf392_6da2b1aabd024e9a8772f0d1672dab05.pdf
- https://static.usrfiles.com/ugd/0fdb6d_59bc5d37c4904c6ba5f42a66cebadc1e.pdf
- https://static.usrfiles.com/ugd/1decf9_16f3734f5ac54c5b9e44709b168b39db.pdf
- https://static.usrfiles.com/ugd/a43ec6_aa2d1d33ed8f44c1a7708825233c70ad.pdf
- https://static.usrfiles.com/ugd/2f7815_08bb2364d4274f88ba24568d73344bb1.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_off0000649c.bin` `55190950c59f3ceb0c1a99cea1b5ee9d51e47bfda2f883a1560ba88736c76cb6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x649C	5288 bytes
`font_01_sfnt_off00007680.bin` `f08f7006923542187f7de51b524623da3ab420b62db9f627c604a7002b067b8b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7680	10312 bytes

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