PDF malware analysis — malicious · 40034562de5635d4

MALICIOUS

PDF

49.5 KB Created: 2020-09-01 10:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 8a39ee7649e14640e6ec2e28179bbb2d SHA-1: a3e8bee9f8a49665e6995c4282c956f1c5fbe61e SHA-256: 40034562de5635d4b8c04509bfe272242ee090bc55b0e2ede07364b0a1fd15c7

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=limits+of+logarithmic+functions+worksheet'. This URL is embedded within the document body, disguised as a worksheet title. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many of which lead to benign Shopify domains, but the primary redirector is malicious. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of a phishing or redirection attack.

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.ru/wix?keyword=limits+of+logarithmic+functions+worksheet
- https://cdn.shopify.com/s/files/1/0457/9157/6230/files/13447434677.pdf
- https://cdn.shopify.com/s/files/1/0436/8501/9801/files/mango_responsive_ecommerce_html5_template_nulled.pdf
- https://cdn.shopify.com/s/files/1/0435/9897/1038/files/jotomugixebunaxatu.pdf
- https://cdn.shopify.com/s/files/1/0428/7964/7903/files/download_truffle_butter.pdf
- https://static.usrfiles.com/ugd/bfbc46_bd43ab5a32ab47dd9e96fc7b2d775b03.pdf
- https://static.usrfiles.com/ugd/b8c837_e83cb3f7aa5748c1ab91b8ec145a8655.pdf
- https://static.usrfiles.com/ugd/09c3c7_a77f3dc8b4d5405899d5b86442423b1f.pdf
- https://static.usrfiles.com/ugd/7dd30d_ae90712516644ac2902a4e044489fc68.pdf
- https://cdn.shopify.com/s/files/1/0433/4895/1194/files/totoxanojipovixenirukegab.pdf
- https://cdn.shopify.com/s/files/1/0437/3417/1800/files/44181126823.pdf
- https://static.usrfiles.com/ugd/b8c837_fe82880a10074a2c838525e9813570a2.pdf
- https://static.usrfiles.com/ugd/b8bbd7_e80c7e9353ad43aa95de7c9cfe3e9716.pdf
- https://static.usrfiles.com/ugd/b42fd6_c9780e141e6a407a8d63a10fe6024701.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_off000063eb.bin` `afa27cf55e9b3b3dbcaefa20d9a55150faaa8a488cbadb06ff59211ef6077b0d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x63EB	5392 bytes
`font_01_sfnt_off0000762f.bin` `3689b8ba6c135a0927c9814b6bc0318353122fd7b07e73f885e5c87a24c875c2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x762F	14092 bytes
`font_02_sfnt_off0000a2b0.bin` `84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA2B0	16060 bytes

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