PDF malware analysis — malicious · 3b517165dc9cef70

MALICIOUS

PDF

61.1 KB Created: 2020-11-11 02:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: 8049c30458207c86b7a6f94e57ae5030 SHA-1: 437eb92d158be224bb871e41f8a25f7fa7686db6 SHA-256: 3b517165dc9cef7025c10de140e43b0f0e90b0909636f8affd0fb5e5a0f883a9

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous external links, including one pointing to 'trafftec.ru', which is flagged as an SEO redirector likely used for phishing or malware distribution. The PDF's structure suggests it's part of a link farm designed to drive traffic to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.7882

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
External URI info PDF_URI

PDF contains an external URL action
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://trafftec.ru/aws?keyword=secret+garden+movie+cast PDF link annotation
- https://cdn-cms.f-static.net/uploads/4418170/normal_5f9cd23320f96.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368758/normal_5fa3ec6d89647.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393181/normal_5f8f5bce0128d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366029/normal_5f89c3ce758a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365639/normal_5f8758bd2468c.pdfIn PDF document text
- https://saxejuwujare.weebly.com/uploads/1/3/4/4/134448786/9809206.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4481055/normal_5fa94ccdd725e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/xedobox/vht_wrinkle_black_paint_advance_auto.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/75db2ac8-a5eb-4f69-b189-5c299842a890/manual_de_cocina_profesional.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/901522a0-d069-46ea-86e2-92eafc8a96f9/66279647530.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/abdc0ba8-0db8-4c1f-81b2-f04d4cd720ce/kuwetumelikijuvojinu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7ca3a739-78e8-4f69-b1bc-3a7da5b390e4/digekujojuverikegonagatak.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/39f1c85c-d1ae-432d-bd5c-fafb178d8795/jujojutujifofuxopukikovud.pdfIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c24c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC24C	5392 bytes
SHA-256: `be053dc0254db5d9783574ceb2f017fc75ee0f1e4ddaa0e4be1d6a1cf6babf38`
`font_01_sfnt_off0000d491.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD491	10404 bytes
SHA-256: `66f754ceb8752393c9ae6b01ebfc0dc557e73633a13ad3041938c80cd8debecd`

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