PDF malware analysis — malicious · d9c2a2bab7622f76

MALICIOUS

PDF

39.9 KB Created: 2020-08-29 05:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b67a98588085c3a3ffdc789808ac2a14 SHA-1: 8677c3a4b9f7b69f4ce6bbde3c4399498dc968fd SHA-256: d9c2a2bab7622f768e5993a4bdd0f60dc2c0a11d7ac60036f90234a008dbd73f

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file contains a malicious redirector link disguised as a solutions manual. The primary malicious URL, https://ttraff.cc/wix?keyword=elementary+analysis+solutions+manual+pdf, is designed to lure users into clicking it. The file also exhibits characteristics of a link farm, with numerous external PDF links, many of which point to benign content, likely to improve SEO for the malicious redirector. The ML classifier strongly indicates maliciousness.

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=elementary+analysis+solutions+manual+pdf
- https://cdn.shopify.com/s/files/1/0438/2969/0530/files/revo_uninstaller_pro_gigapurbalingga.pdf
- https://cdn.shopify.com/s/files/1/0437/0645/0073/files/free_excel_charts_and_graphs_templates.pdf
- https://cdn.shopify.com/s/files/1/0431/3153/5509/files/wafawosanazivazujapujige.pdf
- https://static.usrfiles.com/ugd/b8c837_4edbcc0d5211429abf7ad1c0fc10e65d.pdf
- https://static.usrfiles.com/ugd/b8c837_bdfd312934db4f7abe1f82318d54d2ac.pdf
- https://static.usrfiles.com/ugd/b8c837_827da922098545088a16e3430e65f54c.pdf
- https://static.usrfiles.com/ugd/b8c837_8afbc1d284604938b04773cf9b93acff.pdf
- https://static.usrfiles.com/ugd/b8c837_870f38f1880f485db65ace1972aabca5.pdf
- https://static.usrfiles.com/ugd/b8c837_7ae49ca277b14659b5e708274f01ce8e.pdf
- https://static.usrfiles.com/ugd/b8c837_be56c00269f04664a1e7dad5c50e2fb0.pdf
- https://static.usrfiles.com/ugd/b8c837_8147c36b037b4abea8f36a30e2941026.pdf
- https://static.usrfiles.com/ugd/b8c837_28237fae30c04174b736ac541252ede6.pdf
- https://static.usrfiles.com/ugd/b8c837_0f3b9c2cb1cd470db88665cd18bc7821.pdf
- https://static.usrfiles.com/ugd/b8c837_088496f877554fc7baa16a55277a884e.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_off00005e24.bin` `0d140cc5906780037633eba8e823f826569cdb8e5e1d08bb5de980feb7029033`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E24	5244 bytes
`font_01_sfnt_off00006feb.bin` `e7b5c2d404cd5711607ee0aa5b966499e621423e8738f6773aafc4165fa75013`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FEB	10256 bytes

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