PDF malware analysis — malicious · 21238af694a932a6

MALICIOUS

PDF

48.9 KB Created: 2020-07-31 10:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 0672144e2d1cebb97c6fb432a5f430f8 SHA-1: 14bee53f433251cc0e0b3f2b54a5a3a61c8fa9d6 SHA-256: 21238af694a932a66977d5d7a0a3283309aa6b7587072f25397c6893941fa51d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a lure to trick users into visiting malicious sites under the guise of providing algorithm tutorials. The ML classifier also strongly indicated maliciousness.

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=design+and+analysis+of+algorithm+tutorialspoint+pdf
- http://files.jameslfoxphotos.com/uploads/1/3/2/7/132712209/nosadutakugodet.pdf
- http://files.tonneysclass.com/uploads/1/3/1/4/131407051/duwokajomozatabofuj.pdf
- http://files.medicalequipmentcorp.com/uploads/1/3/0/8/130873893/7cf02b.pdf
- http://files.suffernbasketballprogram.com/uploads/1/3/1/4/131453684/lumiravoga_lakur_biximalowejow_viwaxegofixut.pdf
- http://files.suffernbask
- https://cdn.shopify.com/s/files/1/0436/0405/0084/files/72900762663.pdf
- https://cdn.shopify.com/s/files/1/0431/6489/3345/files/jugonutunewevenezapomun.pdf
- https://cdn.shopify.com/s/files/1/0434/1222/6200/files/2727151066.pdf
- https://cdn.shopify.com/s/files/1/0433/2178/6521/files/77706001009.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekerumukin.pdf
- https://cdn.shopify.com/s/files/1/0436/0221/5074/files/68991115046.pdf
- https://cdn.shopify.com/s/files/1/0433/8175/1964/files/kopoduwonurija.pdf
- https://cdn.shopify.com/s/files/1/0438/2231/7728/files/xumixawefonotot.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2500557594.pdf
- https://cdn.shopify.com/s/files/1/0433/3145/3081/files/742137328.pdf
- https://cdn.shopify.com/s/files/1/0433/7814/7491/files/20121458792.pdf
- https://cdn.shopify.com/s/files/1/0428/0814/8127/files/garewosabumulezetu.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_off00006c32.bin` `7338add942f6bb7aaf8d885afdcbc01402c74a42663c7a989713d4e1ffcd8f89`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6C32	5440 bytes
`font_01_sfnt_off00007e89.bin` `689ab561e2c08c6b6bd449a8c39d15453041464a28cf18f2dffb31e01dc96bd5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E89	9920 bytes
`font_02_sfnt_off0000a0b7.bin` `275d0ef8f619a30f75d5b67021c85ffe51dbf44d82a44ecb2d07128ff93f9399`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA0B7	16112 bytes

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