PDF malware analysis — malicious · b4f64c562dea5af0

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 18:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9248dffb04157f3ec80fef04deffc9b4 SHA-1: a374649f5bdbdc2799acb0a3284500eb95a512e8 SHA-256: b4f64c562dea5af01b7e5f367bc0943476007c8a4272dfa2066f2603e17bc3e8

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF document contains a mass of external links, many of which point to benign content on cdn.shopify.com, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to academic solutions and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a final malicious payload.

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=hall+and+knight+higher+algebra+solutions+pdf
- https://cdn.shopify.com/s/files/1/0436/9429/3142/files/arun_vijay_songs_free.pdf
- https://cdn.shopify.com/s/files/1/0433/9033/7174/files/lipunogaxomevozivadavalev.pdf
- https://cdn.shopify.com/s/files/1/0433/8037/5704/files/52371394696.pdf
- https://cdn.shopify.com/s/files/1/0434/4253/6604/files/sadoxovimukinal.pdf
- https://cdn.shopify.com/s/files/1/0436/7430/4662/files/34588850032.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lurexemip.pdf
- https://cdn.shopify.com/s/files/1/0440/3340/9174/files/daxabilifaveduwavipodido.pdf
- https://cdn.shopify.com/s/files/1/0432/4563/3699/files/rolafubojeva.pdf
- https://cdn.shopify.com/s/files/1/0434/8837/9032/files/boeing_777_aircraft_maintenance_manual.pdf
- https://cdn.shopify.com/s/files/1/0427/9622/0572/files/75678057405.pdf
- https://cdn.shopify.com/s/files/1/0435/1806/6842/files/51325510301.pdf
- https://cdn.shopify.com/s/files/1/0432/5939/6254/files/muxobuvituxafupukis.pdf
- https://cdn.shopify.com/s/files/1/0438/9611/1259/files/microbiology_an_evolving_science_4th.pdf
- https://cdn.shopify.com/s/files/1/0432/4841/8973/files/41291956729.pdf
- https://cdn.shopify.com/s/files/1/0431/8127/7342/files/xiwijejotu.pdf
- https://cdn.shopify.com/s/files/1/0428/5012/3943/files/jexeluf.pdf
- https://cdn.shopify.com/s/files/1/0428/8688/9639/files/84001638928.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_off00006466.bin` `a4723c851de168a3f65bda9d6fde9e007a0599a1e201923fd99d89fb830967db`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6466	5468 bytes
`font_01_sfnt_off000076e6.bin` `05406bfdf53eaf218e600c44ef2e39def10f91c167dd36fcf0d0d2ab1944d640`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x76E6	10072 bytes

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