PDF malware analysis — malicious · b3be16877918600b

MALICIOUS

PDF

42.3 KB Created: 2020-08-30 18:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b86ba915521efb4e1a4767dc2e236cb3 SHA-1: d17564b6366db565a2f1df11c2598c2c6e07e87c SHA-256: b3be16877918600bf687c1ede93dca6bcc6ce9b6311f5219064d9ad8629a40da

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics as a malicious redirector and a link farm. It contains a large number of embedded URLs, with the primary redirector being https://ttraff.com/wix?keyword=french+reading+comprehension+workshe. The document body, though heavily obfuscated, also contains this URL, suggesting its purpose is to lure users to malicious sites. No scripts were extracted from this sample.

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.com/wix?keyword=french+reading+comprehension+workshe
- https://cdn.shopify.com/s/files/1/0432/6568/7717/files/jivavodumelozifajemenu.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bizem.pdf
- https://cdn.shopify.com/s/files/1/0437/9466/1538/files/kenuma.pdf
- https://cdn.shopify.com/s/files/1/0427/6636/8935/files/gajatexoxekifuku.pdf
- https://static.usrfiles.com/ugd/b8c837_f81a524b494b4cceaccf729746aa510e.pdf
- https://static.usrfiles.com/ugd/8b9728_c4e3e7f5858d4e29815591cbd146b83a.pdf
- https://static.usrfiles.com/ugd/067ecb_9892f7e5a289472eb0938e0204c6250d.pdf
- https://static.usrfiles.com/ugd/9219f8_239174891cec4adba7660e9c14a1eb46.pdf
- https://cdn.shopify.com/s/files/1/0434/0331/3308/files/relonazeke.pdf
- https://cdn.shopify.com/s/files/1/0434/7019/2805/files/1720813701.pdf
- https://cdn.shopify.com/s/files/1/0435/8399/6063/files/dokenaganorebur.pdf
- https://cdn.shopify.com/s/files/1/0428/2961/1171/files/89625165188.pdf
- https://cdn.shopify.com/s/files/1/0439/3166/4552/files/national_certified_medical_assistant_exam_secrets_study_guide.pdf
- https://cdn.shopify.com/s/files/1/0434/0600/0282/files/graco_size4me_65_manual.pdf
- https://cdn.shopify.com/s/files/1/0440/7332/0600/files/netter_cardiology.pdf
- https://cdn.shopify.com/s/files/1/0431/6866/1660/files/36210056907.pdf
- https://cdn.shopify.com/s/files/1/0429/1405/4300/files/25759130516.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_off0000666c.bin` `5c2fc7cef68675bd900af978569e702b93f0f23de5fc09d5a0a2128b4c9a837c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x666C	5564 bytes
`font_01_sfnt_off0000793a.bin` `0b0dfdcb1fb9fc14953ad6901e6d87b4b79fa18f6cb8d882eac812e0d6f7877a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x793A	10120 bytes

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