PDF malware analysis — malicious · a988157e2c0bdb74

MALICIOUS

PDF

51.3 KB Created: 2020-08-30 06:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bc20f73dea21faede1f8d5205260707c SHA-1: c0e102bb7e28be796481e152e736ba47a5aec5bb SHA-256: a988157e2c0bdb74a12f364fbc577e30ce2bbfd825c9336e5323ed4251d1a72b

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary redirect URL is `https://ttraff.com/wix?keyword=programming+principles+and+practice`. Another heuristic identified a PDF link farm, with `https://cdn.shopify.com/s/files/1/0453/2862/9915/files/useful_adjectives.pdf` being the first URL found. 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.com/wix?keyword=programming+principles+and+practice
- https://cdn.shopify.com/s/files/1/0453/2862/9915/files/useful_adjectives.pdf
- https://cdn.shopify.com/s/files/1/0428/2174/6847/files/20584411917.pdf
- https://cdn.shopify.com/s/files/1/0434/7019/2805/files/firodem.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.pdf
- https://cdn.shopify.com/s/files/1/0432/2564/5211/files/43025756994.pdf
- https://cdn.shopify.com/s/files/1/0429/5675/1002/files/fugabejapukigube.pdf
- https://cdn.shopify.com/s/files/1/0431/3304/2839/files/ponabikawexawaxo.pdf
- https://cdn.shopify.com/s/files/1/0431/8153/9483/files/soda_login.pdf
- https://cdn.shopify.com/s/files/1/0435/2802/8312/files/vengeful_spirit_build_guide.pdf
- https://cdn.shopify.com/s/files/1/0436/0926/0190/files/ias_baba_upsc_syllabus.pdf
- https://cdn.shopify.com/s/files/1/0428/9980/0217/files/cengage_chemistry_jee_advanced.pdf
- https://cdn.shopify.com/s/files/1/0434/3549/1490/files/10811248119.pdf
- https://cdn.shopify.com/s/files/1/0436/7728/6565/files/dadobozizama.pdf
- https://static.usrfiles.com/ugd/33a16d_e399d0add5e44e5b8bae18fd5cc48f87.pdf
- https://static.usrfiles.com/ugd/b4a829_7f7431d51d514a0f8536c2c1d0792737.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_off000071a8.bin` `18f141b2ffd5712743b86800a2b082e19a612f7f2a0e90bee06e24ee06620ac3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71A8	5180 bytes
`font_01_sfnt_off0000831e.bin` `014021c175c8826bddd4c955a4af21927bcc58d84ea914122df8a75d3f6d9eb1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x831E	15216 bytes
`font_02_sfnt_off0000b21b.bin` `1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB21B	4324 bytes

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