PDF malware analysis — malicious · 43cced2a72fa9623

MALICIOUS

PDF

42.4 KB Created: 2020-09-01 18:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b572793dded11d55dd1f42c4c80ea637 SHA-1: 578019cf9cbabb3f7872ab46959f27394e24fcce SHA-256: 43cced2a72fa9623432b5fc026d69ba3dcd3b88335f40fe6e897871dafba6732

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1566.002 Spearphishing Attachment

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=android+browser+apk+old+version'. This URL is presented to the user as a lure to install a browser extension or update, a common social engineering tactic. The document also contains a large number of embedded links, many of which point to PDF files hosted on static.usrfiles.com, suggesting a link farm or distribution mechanism.

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.
Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE

Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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=android+browser+apk+old+version
- https://static.usrfiles.com/ugd/b8c837_c2b40a6c92a148beb51f13c8c48f486a.pdf
- https://static.usrfiles.com/ugd/e33828_50d9112313d4473097cfcc07fb88dc7b.pdf
- https://static.usrfiles.com/ugd/7f16bd_0b842698b6c041dbafb3f5bce97d6992.pdf
- https://static.usrfiles.com/ugd/3ce946_1191d8dc4cf540959368247118c0e3a4.pdf
- https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ledarelepiwex.pdf
- https://cdn.shopify.com/s/files/1/0435/3510/6200/files/63452714988.pdf
- https://cdn.shopify.com/s/files/1/0440/3170/5238/files/pivikove.pdf
- https://cdn.shopify.com/s/files/1/0434/1995/9463/files/79431967440.pdf
- https://cdn.shopify.com/s/files/1/0432/7990/9030/files/affidavit_of_residence_form_free.pdf
- https://cdn.shopify.com/s/files/1/0432/1912/4382/files/91868946153.pdf
- https://static.usrfiles.com/ugd/9edd50_898c6d6a47724bac908c43a262ab6b5e.pdf
- https://static.usrfiles.com/ugd/98857b_19841e3951d54fe5b7d036e0d1435078.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_off00005b22.bin` `cae92f250607ac1ebfd2e6c6ef6b45a2aa6c997c3c3ce48a81b5fca6786c2605`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B22	5004 bytes
`font_01_sfnt_off00006c32.bin` `4c80de27a1b09c9d94eef6f88837a1e1b8db0ea37a292b1756934891da471f4d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C32	10084 bytes
`font_02_sfnt_off00008eb0.bin` `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EB0	4324 bytes

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