PDF malware analysis — malicious · 76287c4e0aa4cf97

MALICIOUS

PDF

53.0 KB Created: 2020-08-29 00:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bfe1bbc7779177ce04d74f6c0dd76501 SHA-1: 0ddc1eba07f22da146c3e99d58872ef446ed9603 SHA-256: 76287c4e0aa4cf977d694c852c93bf7adda9e56a07ca74b70242e973d29c1fee

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm. The primary malicious URL identified is https://ttraff.cc/wix?keyword=english+grammar+class+3+pdf. No scripts were extracted, and the document body contained mostly garbage data and URLs.

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.cc/wix?keyword=english+grammar+class+3+pdf
- https://cdn.shopify.com/s/files/1/0441/3623/5160/files/ferokevapeziv.pdf
- https://cdn.shopify.com/s/files/1/0437/2496/3990/files/audience_analysis_in_business_communication.pdf
- https://cdn.shopify.com/s/files/1/0430/3942/4669/files/89166024632.pdf
- https://cdn.shopify.com/s/files/1/0434/9971/6770/files/year_end_report_card_comments.pdf
- https://cdn.shopify.com/s/files/1/0433/3204/2920/files/52633855007.pdf
- https://cdn.shopify.com/s/files/1/0435/3445/0840/files/93103716873.pdf
- https://cdn.shopify.com/s/files/1/0463/0786/8834/files/lebidajizop.pdf
- https://cdn.shopify.com/s/files/1/0433/6992/2714/files/togujo.pdf
- https://cdn.shopify.com/s/files/1/0428/1804/4063/files/37304289809.pdf
- https://cdn.shopify.com/s/files/1/0434/9768/5157/files/napas.pdf
- https://cdn.shopify.com/s/files/1/0429/1824/8601/files/swka_angielski_poziom_b2.pdf
- https://cdn.shopify.com/s/files/1/0432/2358/0830/files/blender_bottle_recipes.pdf
- https://cdn.shopify.com/s/files/1/0428/3842/5766/files/tremendos_galileos_discografia.pdf
- https://cdn.shopify.com/s/files/1/0437/1759/1189/files/arabic_malayalam_dictionary_download.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006341.bin` `e26a72aeda35bb6ee7d58aca1dccf694d71c0ac2050ed03268746c4a90c82f95`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6341	5692 bytes
`font_01_sfnt_off0000765e.bin` `1b7399783cab615e72726ee69b5abd8c87986855270aba2b66736f2ef3c29daf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x765E	7144 bytes
`font_02_sfnt_off00008a7c.bin` `3a954763e79dc4ac159474361c960de741bab54b5d195dc07ab9e7f60b838a80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A7C	10180 bytes
`font_03_sfnt_off0000ad5a.bin` `c1e6ffc75750c5739b28184ea098192487e1c360ff13057a509a4a6bbbe05e79`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD5A	17492 bytes

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