PDF malware analysis — malicious · 92ed4685279440c1

MALICIOUS

PDF

37.7 KB Created: 2020-08-06 02:11:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b11a6bf81e62dfa416742cc2e32e7e5f SHA-1: d6d6ec99011a513eb150185fd09c8aad352bf95b SHA-256: 92ed4685279440c1db366ae96453d10f1ba48b20152f0b0d7284ca93a5814cc8

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This suggests a link farm attack pattern designed to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

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/pify?keyword=caudillos+de+la+revolucion+mexicana+enrique+krauze+pdf
- http://files.pennyandpearlstudio.com/uploads/1/3/0/8/130873902/xozelitusudapot.pdf
- http://files.domegaiacommunities.com/uploads/1/3/1/6/131606822/6344667.pdf
- http://files.whereismyeraser.com/uploads/1/3/1/4/131437728/4f73d5d0368d09c.pdf
- https://cdn.shopify.com/s/files/1/0430/8323/5489/files/320523168.pdf
- https://cdn.shopify.com/s/files/1/0436/8393/8457/files/pololu_a4988_datasheet.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
- https://cdn.shopify.com/s/files/1/0429/6392/7206/files/lg_mini_split_manual.pdf
- https://cdn.shopify.com/s/files/1/0428/2286/0966/files/vanudusuzidule.pdf
- https://cdn.shopify.com/s/files/1/0433/3253/4440/files/49602433567.pdf
- https://cdn.shopify.com/s/files/1/0434/3057/6278/files/phonics_worksheets_free.pdf
- https://cdn.shopify.com/s/files/1/0433/2378/5370/files/11379523806.pdf
- https://cdn.shopify.com/s/files/1/0431/3209/2573/files/rudeturotulavapoze.pdf
- https://cdn.shopify.com/s/files/1/0428/0087/3631/files/betorimofivepemegilolor.pdf
- https://cdn.shopify.com/s/files/1/0430/9821/0461/files/76771148775.pdf
- https://cdn.shopify.com/s/files/1/0437/1313/4743/files/41141009916.pdf
- https://cdn.shopify.com/s/files/1/0429/8457/1031/files/76642817097.pdf
- https://cdn.shopify.com/s/files/1/0435/9494/0573/files/puvatuxo.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_off00004f86.bin` `8c4e417dec858441c13e1a48df076d56d3a65b8f2c018b6aad055a2e3df38d02`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4F86	5572 bytes
`font_01_sfnt_off00006274.bin` `95eb68d1ebf98622daf1d59717e2030c0de2e836d36b1ae241383ec35c6d0c31`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6274	11376 bytes

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