PDF malware analysis — malicious · f8d2aa785799c2f8

MALICIOUS

PDF

40.6 KB Created: 2020-08-19 00:12:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b32e7872c121fb270c99f3f0ee19e41f SHA-1: 4054412f1b8ea1734cab1f514bf30b8230645c5d SHA-256: f8d2aa785799c2f811b1a0c990515ff23aae9cd0d0646e5d3a9cb352425f7c13

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to direct users to malicious infrastructure, specifically identified by the critical PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.ru/pify?keyword=easy+disney+piano+sheet+music+pdf, which is likely used to redirect users to a further malicious destination. The document body, though heavily obfuscated, contains references to this URL and other PDF links, supporting the SEO link farm detection.

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.ru/pify?keyword=easy+disney+piano+sheet+music+pdf
- http://gajavum.brandywinemartialarts.com/uploads/1/3/1/6/131606156/e843efbdd2a4.pdf
- http://files.revdonnarenfro.com/uploads/1/3/2/6/132681767/sabat_gazezirutesuki.pdf
- http://files.johnnybeerling.co.uk/uploads/1/3/1/4/131453226/lefamefivugabe.pdf
- http://files.smartbrainenglish.com/uploads/1/3/1/0/131070469/6594031.pdf
- http://files.usmma-nepa.org/uploads/1/3/1/3/131383777/nujigiduluriwelafew.pdf
- https://cdn.shopify.com/s/files/1/0431/9540/0356/files/61903789209.pdf
- https://cdn.shopify.com/s/files/1/0431/7678/8117/files/fulojalov.pdf
- https://cdn.shopify.com/s/files/1/0428/8937/9996/files/nekogav.pdf
- https://cdn.shopify.com/s/files/1/0427/4746/1788/files/43754916158.pdf
- https://cdn.shopify.com/s/files/1/0438/2697/0786/files/22883848246.pdf
- https://cdn.shopify.com/s/files/1/0434/6196/8025/files/aptis_test_samples.pdf
- https://cdn.shopify.com/s/files/1/0432/5395/6758/files/sowefomaneligozepowomo.pdf
- https://cdn.shopify.com/s/files/1/0437/1690/3080/files/4424891989.pdf
- https://cdn.shopify.com/s/files/1/0432/0431/3247/files/benchwork_and_fitting.pdf
- https://cdn.shopify.com/s/files/1/0429/1005/6615/files/dezizesigafud.pdf
- https://cdn.shopify.com/s/files/1/0432/4048/9122/files/kawelutebipidirofinokelu.pdf
- https://cdn.shopify.com/s/files/1/0428/5192/6183/files/76821568557.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_off00006102.bin` `f6396c830885b202d28935df6294e09c8cec7e94a336c3e652443715a9893ebb`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6102	5324 bytes
`font_01_sfnt_off00007302.bin` `28f5ab43fdd56662a39ddc14c47477540e5360eebc58a0f1f9aecce464e937fd`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7302	10088 bytes

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