PDF malware analysis — malicious · 2f7375a2159044c7

MALICIOUS

PDF

39.2 KB Created: 2020-08-08 06:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: baf0d21ab2f63ce5b010ef83d154bd92 SHA-1: c0699136b936e9e42dcb0e74217fcc3afd63d400 SHA-256: 2f7375a2159044c764ea3e77c5f9180b8cbf93e213d2591952e41e3599831eb5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the primary intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=prefix+and+suffix+worksheets+3rd+grade+pdf
- http://files.thekindnesspandemic.org/uploads/1/3/1/6/131606289/935042.pdf
- http://files.sotvpreschool.com/uploads/1/3/0/7/130738993/bd6d66.pdf
- http://files.cakesandcruffles.com/uploads/1/3/1/8/131857465/4564220.pdf
- http://files.constitutionalcritique.com/uploads/1/3/2/6/132696483/murulu_xunetiludovi_bukawifakik.pdf
- http://files.us-history.net/uploads/1/3/2/7/132712661/nabefogomaro.pdf
- https://cdn.shopify.com/s/files/1/0435/9825/0146/files/cantata_131_bach.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdf
- https://cdn.shopify.com/s/files/1/0428/4219/4083/files/segogu.pdf
- https://cdn.shopify.com/s/files/1/0439/0954/6136/files/auld_lang_syne_piano_solo.pdf
- https://cdn.shopify.com/s/files/1/0434/5479/1846/files/potetatuf.pdf
- https://cdn.shopify.com/s/files/1/0432/7243/7910/files/dunasuzizo.pdf
- https://cdn.shopify.com/s/files/1/0431/2875/0241/files/monthly_counseling_example.pdf
- https://cdn.shopify.com/s/files/1/0439/0472/9243/files/wipufosawuxorusolusujet.pdf
- https://cdn.shopify.com/s/files/1/0428/5415/4406/files/89850390453.pdf
- https://cdn.shopify.com/s/files/1/0428/3406/7615/files/19048795736.pdf
- https://cdn.shopify.com/s/files/1/0433/9079/5934/files/innovator_s_dilemma_summary.pdf
- https://cdn.shopify.com/s/files/1/0428/8544/7833/files/72873694722.pdf
- https://cdn.shopify.com/s/files/1/0428/2017/3983/files/acca_f2_notes_2020.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_off00005b60.bin` `f2963dc0aa66163eb605128f34b13c8578b3443fec419e13990e8a4cada1cc50`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5B60	5660 bytes
`font_01_sfnt_off00006ec3.bin` `0a552799ab82782431f49de63ecd6e415646abb8ef040e83cc7fb9e7b1a9527b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6EC3	9452 bytes

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