PDF malware analysis — malicious · 390251b4bd9acf69

MALICIOUS

PDF

47.5 KB Created: 2020-08-03 21:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 99f2804e9554b5c4fd7e163c112a3d62 SHA-1: 763863bc0a52abb11335e0fc8ca73d1d7da4860b SHA-256: 390251b4bd9acf6941185b17d4c22caa3bfd8d3e77d5a13e4b9a2a61a0d8f2e4

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download for 'microstrip antenna theory pdf'. The link, https://ttraff.cc/pify?keyword=microstrip+antenna+theory+pdf, is a known malicious redirector. The document also contains a large number of other links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for malicious content. The ML classifier strongly flagged this PDF as malicious.

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=microstrip+antenna+theory+pdf
- http://files.j9wise.net/uploads/1/3/0/9/130968947/pedajilona_midapulufep_timibav.pdf
- http://files.shirlarae.com/uploads/1/3/1/1/131163957/kasasigabo.pdf
- http://files.vintagecycling.org/uploads/1/3/2/7/132712355/f03148.pdf
- http://files.thesanctiflychick.com/uploads/1/3/0/7/130739831/2782723.pdf
- https://cdn.shopify.com/s/files/1/0430/3811/3955/files/todalilidipesijitaf.pdf
- https://cdn.shopify.com/s/files/1/0437/9063/1064/files/gulotelonimonud.pdf
- https://cdn.shopify.com/s/files/1/0431/1842/8326/files/fracture_mechanics_anderson_solution_manual.pdf
- https://cdn.shopify.com/s/files/1/0432/0939/2285/files/16781844247.pdf
- https://cdn.shopify.com/s/files/1/0433/7182/3262/files/78047915534.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61927850068.pdf
- https://cdn.shopify.com/s/files/1/0429/8362/0757/files/docker_run_ubuntu_bash.pdf
- https://cdn.shopify.com/s/files/1/0432/7351/9272/files/79202619235.pdf
- https://cdn.shopify.com/s/files/1/0431/5011/4965/files/xupipulax.pdf
- https://cdn.shopify.com/s/files/1/0433/0638/5573/files/fajivijefalaxole.pdf
- https://cdn.shopify.com/s/files/1/0431/8851/9076/files/bulefo.pdf
- https://cdn.shopify.com/s/files/1/0431/6564/7002/files/mojegubigotimivu.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/
- https://cdn.shopify.com/s/files/1/0433/06

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007bbe.bin` `ae88d3da23ff216e0389ab00a8db941b3edbde34ca25282ae06c19c4af719349`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BBE	5316 bytes
`font_01_sfnt_off00008de6.bin` `5739a3a0566c24e835f9219b4eac9fb7585a18ae1b3589ca0f77b39a3340b898`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8DE6	10140 bytes

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