PDF malware analysis — malicious · bffeb685d58570f2

MALICIOUS

PDF

47.2 KB Created: 2020-09-01 06:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: ab0d10f3339f34eaaf06c885f0b40aff SHA-1: 914907c330089265b6f10a718c3c6b1ea50cb4c1 SHA-256: bffeb685d58570f2d2ca6f720c452de05ba0efee8ae56898ed93e8bfe75853a6

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised with a search query related to 'lesson 10 congruent triangles unit test answers'. The document also functions as a link farm, directing users to numerous other PDFs hosted on static.usrfiles.com and cdn.shopify.com. The ML classifier strongly indicates maliciousness. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.ru/wix?keyword=lesson+10+congruent+triangles+unit+test+answers
- https://static.usrfiles.com/ugd/9904c2_c8490d1ccd794159a72ee781543bf8a6.pdf
- https://static.usrfiles.com/ugd/c345b0_a8ffb6b2c8044abd92eed0440c493555.pdf
- https://static.usrfiles.com/ugd/299074_b68fb3d0ef6e4244b52259c68aaeb0e5.pdf
- https://static.usrfiles.com/ugd/b8c837_bf659a71aaa34ad3a48213a523a3f530.pdf
- https://static.usrfiles.com/ugd/2c7c49_0e8fdd601ac64c9fad955acb832b7897.pdf
- https://cdn.shopify.com/s/files/1/0430/4352/0665/files/20517698159.pdf
- https://cdn.shopify.com/s/files/1/0429/0645/2127/files/83195799746.pdf
- https://cdn.shopify.com/s/files/1/0433/0012/6885/files/jizuz.pdf
- https://cdn.shopify.com/s/files/1/0434/9899/5864/files/medical_cases_book.pdf
- https://cdn.shopify.com/s/files/1/0429/2729/2582/files/amnsie_globale_transitoire.pdf
- https://cdn.shopify.com/s/files/1/0430/6694/9786/files/19154587182.pdf
- https://cdn.shopify.com/s/files/1/0429/8381/7375/files/bcbs_auc_appeal_form.pdf
- https://static.usrfiles.com/ugd/b8c837_356757b73cb642b19deb0bff8ac64bd6.pdf
- https://static.usrfiles.com/ugd/bdeb4c_ba154473300743f58ba9d4c4d81a6eda.pdf
- https://static.usrfiles.com/ugd/90c678_d2b0b3d93d594e4da202a9243e4a116e.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_off00006452.bin` `cdcf8c8a700c267c4339b272b464e54ae82f38909b439a7e2e4b4e731f8a62e8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6452	5192 bytes
`font_01_sfnt_off00007625.bin` `63d5f453cde67651ca0daf836a4913c0ae4d28a6ae331e0816172cc3600d501c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7625	10540 bytes
`font_02_sfnt_off000099f2.bin` `2cc36779403287548c184605c5d9ac9f8e39fd5c9622849292a4135ce18498ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99F2	16208 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.